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Computers in Great Britain
• .. Stanley Gill
Analog Computers and their Application to Heat Transfer
and Fluid Flow - Part I
· •. John E. Nolan
All-Transistor Computer
· .. Neil Macdonald
Roster of Organizations in the Field of Computers and Automation
(cumulative)
Automatic Computing Machinery - List of Types

sensitive, rugged, compact!
Here's a new polar relay that will soon be setting
records for long service life! I ~s sensitivity gives peak
performance for high-speed polarized pulse repeating,
or for applications where low current is transmitted
over long lines_ The Series PTW Relay is also recommended for line-current direction indication or as a
differential relay in the {{Wheatstone Bridge" type of
control. Advanced features include:
simplified design and long service life
New design eliminates many parts and adjustments
formerly required. Relay gives billions of operations
without re-adjustment.
extreme sensitivity
Unit operates on currents as low as 2 to 12 milliamperes, depending upon number and combination of
windings used. Signals as low as 10 milliwatts through
the two line-windings will Utrigger'~ the relay.

Automatic Electric
PTW Relay

reduced bounce and wear
A new method of armature support limits longitudinal
movement. There are no bearings to wear . . . the
usual rocking motion in contact make-and-break is
reduced. Armature bounce is virtually eliminated;
contacts last longer.
improved characteristics in smaller size
Because of increased magnetic efficiency, the coils take
_less space and need fewer turns. The lower coil imped- ailce of this compact unit gives improved characteristics.
'

helpful technical data
Make ancl8reak-75% total "make" on both contacts at 60 cycles per
second with .006" contact gap and 23 milliamperes of sine wave ac.
Simple, easy re·adjustment can be made in the field.
Winclings-Fourwindings: two line·windings, each 139 ohms resistance
and only .5 htmry inductance; other two windings, each 101 ohms and
.125 henry. The number of coil turns to be placed in series aiding can
vary from 1400 to 8400.
Cover-Snap-on cover easily removed for inspection and adjustment
of relay.
Mounting-Jack mountings, available for flush or surface mounting.
Size-2~" wide,2W' deep and 21~" high (plus W' projection of
banana plugs).
For more detailed information, ask for Circular 1821.

fast response
Travel time is as low as .9 milliseconds, depending
upon contact gap and windings used.
send for circular
For a small, fast, sensitive polar relay that out-performs and outlasts all others, specify this new Automatic Electric Series PTW Relay·. For details ask for
Circular 1821. Write: Automatic Electric Sales Corporation', 1033 West Van Buren St., Chicago 7, Ill. In
Canada: Automatic Electric (Canada) Ltd., Toronto.
Offices in principal cities.

SWITCHES

RELAYS
PRODUCTS OF THE

AIJTDMATI[

INOUSTRIAl. DEPARTMENT OF

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~~

ELE[TRI[

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CHICAGO
- - 2 -

PROE8STING, TAYLOR INC.

Automatic Electric
Ad No. RE-40

COMPUTERS AND AUTOMATION
•

CYBERNETICS

•

ROBOTS

AUTOMATIC CONTROL

Vol. 3, No.9

November, 1954
-

ESTABLISHED SEPTEMBER,

1951 _

ARTICLE

Page
. •• Stanley Gill

Computers in Great Britain

6

PAPER
Analog Computers and Their Application to Heat Transfer and
Fluid Flow -- Part 1
... John E. Nolan

20

REFERENCE INFORMATION
Roster of Organizations in the Field of Computers and Automation
( cumulative)

9

Auto'matic Computing Machinery -- List of Types

24

Patents

26

FORUM
Attractive Computers

Bill Oanch

Assembly Line Control by Punch Cards

George W. Patterson

26

All-Transistor Computer

Neil Macdonald

28

4

The Editor's Notes

4

Advertising Index

33

Editor: Ecinund C. Berkeley
Assistant Editors: Eva Di Stefano, Neil Macdonald, F.L. Walker
Contributing Edi tors: Andrew D. Booth, John W. Carr, III,
Alston S. Householder, Fletcher Pratt

Advi sory Corrmi ttee: Samuel B. Willi runs,
Herbert F. Mitchell, Jr., Justin
Oppenheim

Publisher: Edmund C. Berkeley and Associates
36 West 11 St., New York 11, N.Y. --- Algonquin 4-7675
815 Washington St., Newtonville 60, Mass. - Decatur 2-5453 or 3928
Effecti ve September 1, 1954, COMPUTERS AND AUlOMATION is pub1 ished man th1 y, twel ve times a year. Copyright,
1954, by Edmund Callis Berkeley. Subscription rates: $4.50 for one year, $8.50 for two years, in the United
States; $5.00 for one year, $9.50 for ~wo years, in Canada; $5.50 for one year, $10.50 for two years
elsewhere. Adverti sing rates: see page 36.
Entered as second class matter at the Post Office, New York, N.Y.

- 3 -

THE EDITOR'S NOTES
Crucial Knowledge -- the Knowledge that Something
Exists. Often when one investigates a subject, the
crucial knowledge is finding out that so met h ing
exists or can be done. For instance, if you are
investigating from whom to buy an automatic mventory machine, the crucial knowledge is finding out
who offers such machines for sale. A man who has
never heard that the ABC Company offers automatic
inventory machines for sale is hardly in a posi tion
to consider buying from them.
To supply this crucial knowledge of existence in
the field of computers and automation we have pub1 ished various kinds of rosters and reference listsj
there are now ten kinds. And in this issue over 11
pages have been used to give a cumulative Roster of
about 230 organizations in the field of computers
and automation.
Yet one reader, whom we shall call J. Moines since
that is not his real name, has said to us '~ou
should not publish this valuable information for so
littlej you should restrict it, give it only to advertisers perhaps, keep it for your own advantage."
We don't agree with Mr. Moines.Our purpose as a magazine is to be as
useful
as we can bej and we believe these rosters and lists help the men in the field?
Wha.t do you think?

and implications. An article may certainly be
controversial if the subject is discussed reasonably. Ordinarily, the length should be 1000 to
4000 words, and payment will be $10 to $50 on
publication. A suggestion for an article should
be submitted to us before too much work is done.
Technical Papers. Many of the foregoing requirements for articles do not necessarily apply to
technical papers. Undefined technical terms, unfamiliar assumptions, mathematics, circuit dia grams, etc., may be entirely appropriate. Topics
interesting probably to only a few people are acceptable. No payment will be made for papers. IT
a manuscript is borderline, it may be returned to
the author to be modified to become definite 1 y
either an article or a paper.

*--------------------------- *----------------------------Forum: ATTRACTIVE COMPUTERS
Bill Danch, Woodstock, N.Y.

Address Changes. If your address changes, please notify us giving both old
and new addresses, and allow three weeks
for the change.
Back Copies.
page 34.

See the information

on

Manuscripts. We are interested in articles and papers. To be considered for
any particular issue, the manuscript
should be in our hands by the 5th of the
preceding month.
Articles. We desire to publish articles
that are factual, useful, understandable,
and interesting to many kinds of people
engaged in one part or another of the
field of computers and automation. In
this audience are many people who have
expert knowledge of some part of the
field, but who are laymen in other parts
of it. Consequently a writer should
seek to explain his subject, and showi~
context and significance. He should define unfamiliar terms, or use them in a
way that makes their meaning unmistakable. He should identify unfamiliar persons with a few words. He should use
examples~ details, comparisons, analogies, etc., whenever they may help readers to understand a difficult point.
He should give data supporting his argument and evidence for his assertions.
We look particularly for articles that
explore ideas in the field of computers
"The sponsor doesn't want you to pose with his computers. When
and automation, and their applications
you're in the picture, it seems there's no product-identification."

- 4 -

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in set and circuit designs, Sylvania offers a complete quality
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These new components measure only .125 inches in diameter ... requite only 1/6th the space of former units.
At the same time, due to advanced manufacturing techniques and Sylvania's new automatic precision equipment,
they provide far higher performance records.

Sylvania Electric Products Inc., 1740 Broadway, New York 19, N. Y.

This new T-l Series also has recently passed MIL-EIB moisture-resistance tests. Now available in capacities
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ELECTRONICS

5 -

•

TELEVISION

COMPUTERS, IN GREAT BRITAIN

Stanley Gill
(After luncheon talk delivered at the meeting of the Association for Computing Machinery,
Ann Arbor, Michigan, June 25th, 1954)
In 1947, after visiting many computing
centers in America and Europe, he enunciated
what has come to be known as Hartree 's Law.
This states that the difference between the
date on which any given machine will b e c ompleted, and the date of,making the observation,
is a constant (Hartree's Constant). For a long
time there was very little evidence to refute
this; fortunately later work has shown that
Hartree 's Constant can vary, and may eve n become zero.

'Eleven lunches ago I was looking through
the program for this conference, and I saw
that Gordon Welchman was due to speak 0 n the
subject of, computers in 'GreatBri tain.
I
looked forward to the opportunity of meeting
Gordon for the first time, and of hearing the
latest news from back, home.
When I got back
from 1 unch there was a note on my desk: ''Please
call John Carr. '!' I called John and he sa i d,
"Stan, I'm in a hole. Gordon Welchman can't
come; can you give his talk?"
So it appears
that, after all, I am still the bearer of the
latest news from back home. However,itis now
about a year since I left England, sothls talk
must necessarily have a somewhat histori cal
bias •.

Professor Hartree is best des cri be din
the words used by Dr. E. C. Bullard, at the
opening of the computer conference at the National Physical Laboratory in March, I 95 3 :
"The ideal computing machine should be 1 ike
Professor Hartree: sweet and reasonable and
always willing to oblige."

The proper beginning for any historical
survey of automatic computers is Charles Babbage. Babbage had a great effect on the development of the subject. However, there can
be few here who have not heard a good deal about Babbage and his works; so I will take up
the story in more recent times.

A. M. Turing

D. R. Hartree
A dominating personality in the last few
years in Great Britain has been Profess or D.
R. Hartree, who became interested in computing
while investigating the implications of the '
quantum theory in atomic structure. The latter remains his chief" interest, but his concern
with computing led to the building for Manchester University, about 1930, ,of a mechanical
differential analyzer of the type Which had just
been developed by Vannevar Bush at Mass. Inst.
of Technology. A similar machine was later
buil t for the Uni vers i ty of Cambridge, and installed in the Mathematical Laboratory there
when it was opened just before the- war.
Al though Professor Hartree introduced the
differential analyzer to Great Britain, he has
always recognized the importance of developments
in the digital field.
Shortly after the war
he moved to Cambridge, where he has been closely
associated with the work on the Edsac there.
He has willingly accepted scores of invi tations
to speak on computing subjects i in this way, nnd
by virtue of his position on severa~ influential
commi t tees, he has done a great deal to promo te
the research and development of computers.

The first plans for an electronic computer
in Britain were laid at the National Physical
Laboratory, on the formation of the Mathematics
Division there immediately after the war. This
machine was the ACE. Its broad features were
laid down by Dr. A. M. Turing, who was the first
leader of the project. Turing has been another
prominent personality in the computing field,
and has exhibited an amazing variety of capabilities.- In 1936 he published a cIa s sic
paper on a topic which was at that time something completely novel: he used the concept of
an ideal computing machine as a tool in the
study of mathematical logic. Such ideal machines have come to be known as "Turing machines"
-- we have heard them mentioned 0 n c e or twice
at this conference. More recently Turing has
published papers on conventional numerical analysis (errors arising in the solution 0 f simul taneous linear equations), and on the popula r
philosophical question, "Can machines think?"
In the latter connection he suggested a criterion by which this question might be set tie d
for any given machine. He suggested that the
machine be interviewed by a human examiner,who
could communicate wi th it only throug h s 0 m e
suitable channel such as a teleprinter circuit,
and who could not see it. If the machine can
delude the examinermto thinking that he is in
fact communicating with a person, then, Turing
says, the machine can think. Turing's criterion

- 6 -

CDMPUTERS, IN GRFAT BRITAIN

would seem rather difficult to satisfy, but if
we must have a definite criterion, we co u 1 d
hardly find a better one.

ranti machine was installed at the University
of Manchester in 1951. It is interesting to
note that, although Williams' store has since
been used in many places, the Manchester machines are the only ones in which it is used in
a serial fashion.

Turing recently publ ished a lengthy treatise on morphology, the study of biological fol'lll.
He made considerable use of an electronic 'computer in a theoretical investigation 0 f t his
subject. After watching with great in teres t
the wealth and variety of Turing's wor k, i t
came as a great shock to me, and I am sur e to
very many others, to hear of his death only two
weeks ago. There is no doubt that he would have
continued to make invaluable contributions to
the computing field if he had lived. He was,
I believe, only about 40 years of age.

The Manchester climate appears to have had
a subtle effect on programming.
Eng la nd is
known throughout the world for its damp and
dismal weather, and Manchester is known among
Englishmen for its damp and dismal we a t her.
The Manchester system of coding was laid down
by Turing, who moved there as Williams wa s
completing his experimental machine. Turing's
love of mystery led to the use of the scale of
32; 26 of the digits are represented by the
let ters of the alphabet, and the rema i n i n g
6 by an assortment of characters to be found on
the upper shift of most English typew r i t e r s,
viz: @, ct, :, ", ~, and I. It so hap pen s
that zero is represented by I, and since zeros
are not suppressed, a page of coding consists
of a neat rectangular array of symbols, ma n y
of which are /'s. This reminds me of nothing
more than looking out of a window on a r a i ny
day.

Unfortunately Turing had an intol e ran ce
of those not willing or able to master all the
complications which he took in hi~ stride. Thus
the ACE has turned out to be a machine demanding considerable skill of the programmer; but
this fact has permitted great speed, simplicity
and reliability of operation.
Also Turing's
original des ign was, at the time, over-ambitiws
in regard to size. The present ACE follows
closely a simple logical design laid dow n by
Dr. Harry Huskey, who spent the year 1947 with
ths proj ec t.
The Edsac
The ACE is a mercury-tank machine.
I n
construction, it was overtaken by another mer- cury-tank machine: the Edsac, at the Cambridge
University Mathematical Laboratory. Dr. M. V.
Wilkes, who became Director of that Laboratory
after the war, visited the Moore School at the
University of Pennsylvania in 1946, and immediately began to plan his own machine.
The
Edsac first worked in 1949 and has worked, on
and off, ever since. It was in fact the first
, stored-program electronic machine designed for
practical computing to be completed. Its philosophy is opposite to that of the ACE: it is
easy to program, but it was not engineered f~r
very high speed or reliability.
Nevertheless
we have been able to do a great deal of useful
work with it, including a considerable amount
of basic research on programming methods. The
Laboratory has held summer courses in programming every year since 19500
Other Large Computers
Another great center of computer research
is the University of Manchester. Here Professor
F-. C. Williams went after the war to deve lop
his cathode ray tube storage device. In 1949
the first Manchester computing machine was built
to test this store. The electrical fir m 0 f
Ferranti rapidly developed this machine into a
practical computing tool, and the first Fer-

The Ferranti machine has a most impres~ve
looking control console. At the inaugural conference in 1951, Professor Williams pointedout
that this makes it poss ible to play the machine
1 ike an organ. However, Ferranti ap paren t 1 y
feared that the sight of the console mig h t
frighten away prospective customers. They r esorted to a device which has, I believe, been
used elsewhere: they included in the pictur e
of the console an attractive young lad y t 0
divert the attention. * They went even furt he r
than that: to illustrate the ease with wh ich
the machine may be operated, the young 1 a d y
was taking hardly any notice of the con_ troIs
at all; she was busy knitting.
The Manchester machines were designed fran
the start to use two types of storage: electrostatic, and magnetic drum.
Apart from this,
the development of auxiliary stores has be e n
The magnetic drum
somewhat slow in Britain.
was in fact pioneered by Dr. A. D. Booth at the
University of London, but unfortunately pe had
difficulty in obtaining enough financial support to develop it rapidly. Recently the British Tabulating Machine Gbmpany, which marke ts
IBM-type punched card machines, --has put into
production a general purpose medium-sized co~
puter based on Booth's designs, selling for about £16,000 ($45,000).
The magnetic d rum
store has a capacity of 1024 words each of 32
binary digits. These computers are described
as well suited for mathematical work in an industrial research laboratory; the Company i s
developing a computer which will be more suitable for commercial applications.
·see Bili Danch's comment, page 4

- 7 -

COMPtJTERS IN GREAT BRITAIN

,

The ACE has recently been equipped wit h
a magnetic drum auxil iary store. Wo r k proceeded for a time on a drum for the Edsac, but
this was abandoned and the Edsacnow uses magnetic tape. Both the Edsac and the Ferranti
machine, though electronic, are somewhat slow
-- much slower'than the ACE.

own magnetostrictive transducer. Their machine' "Nicholas" uses these elements for the
entire store; they have also buil t a mach in e
using a magnetic disc as the main store, with
short delay elements for rapid access regis.ters.
There are two interesting low speed machines at, the Royal Aircraft Establ ishment and
Atomic, Energy Research Establishment respectively. they each use dekatrons in the arithmetical unit. These are c9ld cathode, gas
filled tubes, each forming essentially o,n E;
stage of a decimal counter. The AEREmachine
has a small store of dekatrons for numbers rurl
is sequenced directly by a punched tape. The
RAE machine is considerably bigger and faster;
it has a large main store on a magnetic drum,
and is sequenced by instructions in this store.
Furthermore it bas buil t:...in floating-p 0 i n t
ari thmetic, so that for calculations w h i c h
require floating point it is as fast as many
high-speed machines.

Nbne of these machines has built-in division. Each has, on the other hand, produced
, offspring. The Edsac has given rise to Le 0,
built for themselves by the firm of J. Lyons
and Company, who are roughly the English equivalent of Howard Johnson's.
In 1947 Lyon s '
decided to acquire an electronic computer for
payroll calculations, factory analyses, etc.
Finding that no electrical firm was prep ared
to build one, they boldly decided to b u i 1 d
their own and modeled it on the Edsac. . The
computer itself was working in 1951 and has
been rented out for scientific applic ati ons;
its use for its intended purpose has been delayed pending the completion of special input
and output equipment.
The Manchester machine has led to a number of Ferranti machines. The second went to
the U!liversi ty of Toronto, the third tot he
Bri tish Ministry of Supply and the fou r th to
Ferranti's· own computing bureau in Lon don.
These are all substantially the same as t he
first Ferranti machine at Manchester Universi~.
The British Post Office has built a machine (the MOSAIC) for the Ministry of Suppl y,
based on Turing's original plans for the ACE.
Lest i tshould' seem strange for a post office
to be found building electronic computers,let
me remind you that the British Post Office has
a monopoly 'of means of communication,including
telephones, and it maintains a large telephone
research laboratory in London.
It was he r e
that the Mosaic was built. A small machine of
the ACE type is also, I believe, being developed for production by the English Elec t ric
Company, who contracted for some of the construction work on the parent machine.
Smaller Computers
These, then, are the leading fami! ies of
Bri tish computers. There are a number of smaller machines and proj ects in existence. Ell iott Brothers, a firm with a long established
reputation for navigational instruments, has
entered the electronic computing field to specialize in machines for naval applications,usllg
"unitized" and "ruggedized" construction. One
of their most interesting developments has been
the magnetostrictive delay line. They have
shown that it is poss ible to make a very efficient acoustic delay element using as a soun d
carrier a wire, several feet in length, coiled
and mounted in a neat package t and acting as its

The Radar Research Establ ishment has bull t
its own machine using the Williams store -- tre
first machine in Britain to use this store in
a parallel fashion. The second such mac h i n e
has now been built by Professor Williams himself ~t Manchester, and christened MEG.
Although MEG has a parallel electrostatic store
(soon to be supplemented by a drum) it ha s a
serial arithmetic unit working at a megacycle
(hence the name). Like the RAE machine, MEG
, has built-in floating-point arithmetic, and is.
probably the first machine of this speed tob~
so. equipped., Addition requires 180 microseconds and multiplication 360 microseconds, incl uding access. MEG resembles the ORACLE a t
Oak Ridge in that transfers may occur in uni ts
of 10 bits, instructions comprising two s uc h
units and numbers comprising four (one for the
exponent and three for the fraction part).
Work is proceeding at Cambridge on a successor (so far unnamed) to the Edsac. The new
machine will have a parallel arithmetical unit
with built-in floating-point arithmetic. Storage was to have been by mercury tanks, used in
parallel fashion, but the design has now been
swi tched to magnetic cores. Details 0 f the
arithmetical unit have been settled and som e
construction has begun, but the complete design
is still not fixed. Dr. Wilkes had proposed a
"microprogram" scheme in which the operatio n s
of the control unit are defined by a d i 0 d e
crystal matrix; but with the advent of magnetic
,cores tbis plan needs some reconsideration.
Looking at any of these machines, ona can
see in them a mixture of both British and American ideas. There is no doubt that our \\Ork in
Great Britain has been stimulated andinfluenc~
to a great ,extent by developments in Americ a •
On the other hand there are some aspects in wch
(continued on page 30)

- 8 -

Roster of Organizations in the Field of Computers and Automation
(Cumulative, information as of October 3, 1954)

The purpose of this Roster is to report organizations
(all that are known to us) making or de velop i ng
computing machinery, or systems, or data-handling
equipment, or equipment for automatic control and
materials handling. In addition, so me organizations making components may be incl u ded in some
issues of the Roster. Each Roster entry when it
becomes complete contains: name of the organiza tion,
its address and telephone number, nature of its interest in the field, kinds of activity it engages
in, main products in the field, approximate number
of employees, year establiShed, and a fewcammen~
and current news items. When we do not have complete information, we put down what we have.

Ga
Pa
Ba

Government activity
Problem-solving
Buying activity
(Used also in combinations, as in RMSa
"research, man ufac t ur i n g and selling
activity")

*C This organization has kindly furnished us wi th
information expressly for the purp oses of the
Roster and therefore our rep or t is likely to be
more complete and accurate than otherwise might
be the case. (C for Checking)
ROS1ER.

We seek to make this Roster as useful and informative as possible, and plan to keep it up to date
in each issue. We shall be grateful for any more
information, or additions or corrections that any
reader is able to send us.
Although we have tried to make the Roster complete
and accurate, we assume no liability for any statements expressed or implied.
This listing is cumulative except for omission of
about a dozen companies making components wh i c h
were pr~viously listed but have apparently 0 n 1 y
remote interes ts in the f iel d of com put e r sand
automationo
Abbreviations
The. key to the abbreviations follows:
Size
Ls

Ms
Ss

Large size, over 500 employees
Medium size, 50 to 500 employees
Small size, under 50 employees (n 0 in
parentheses is approx. no. of employees)
e-"

When Established
Long established organization (1922 or
earlier)
Me
Organization established a "medium" time
ago (1923 to 1941)
Se
Organization established a short time ago
(1942 or later) (no. in parentheses is
year of establishment)
Le

Interest in Computers and Automation
Dc
Digital computing machinery
Ac Analog computing machinery
Ic
Incidental interests in computing machinery
Sc Servomechanisms
Cc Automatic control machinery
Mc
Automatic materials handling machinery
Activities
Ma Manufacturing activity
Sa
Selling activity
Ra Research and development
Ca Consulting
- 9 -

Adalia Limited, Odeon Bldg., 20 Carlton St. East,
Toronto, Ont., Canada / Empire 4-2361
Research and consulting services in the applicatioQ, design, and' construction of computers. Ss Se(1952) RCa
Addressograph-Mul tigraph Corp., 1200 BabbittRoad,
Cleveland 17, Ohio / Redwood 1-8000 / and elsewhere *C
Addressograph sensing plates,composed automatically from punched tape, which will automatically list and total figures. Data written
at speeds up to "30 forty-character lines per
second; as a byproduct, codes automatically
punched into punch cards. Electronic facsimile printers for high-speed copying 0 f
typed data contained in unit card records.
Ls(8000) Le(1898) Ic RMSa
Aircraft-Marine Products, Inc., 2100 Pa x ton St.,
Harrisburg, Pa. / Harrisburg 4-0101 /
*C
Patchcord programming systems, patc h cords,
automatic wire terminators. Ls(1600)
Me
(1941) Ic RMSa
Alden Electronic and Impulse Recording Equipment
Co., Alden Research Center, Westboro, Mas s. /
Westboro 467 /
*C
Facsimile recording equipment and facsimile
components; "On-the-Spot Fact Finders", pulse
records, automatic curve plotters. Recorder
t:\::1t monitors any machine or action and records automatically. Ms(450?) Se Ic RMSa
Alden Products Co·., 117 No. Main St., Bro c kton,
Mass. I Brockton 160 /
*C
General and specific components for digital
and analog computing machinery; plug-in components, sensing and indicating components,
magnetic delay line units, magnetic storage
cores, etc. Ms (300) Me (1930)" Ic RMSa
Alfax Paper and Engineering Co., Alden Resea r c h
Center, Westboro, Mass. / Westboro 467 /
*C
Electrosensitive recording papers.
Ms Se
(1942) Ic RMSa
R. C. Allen Bus iness Machines, Inc., 678 Front Av.,
Grand Rapids 4, Mich. / Glendale 6-8541 /
*C
Adding machines, bookkeeping machines, cash
registers, etc. Ls (1250) Me (1932) Dlc RMSa
American Automatic Typewriter Co., 614 North Carpenter St., Chicago 22, Ill.
*C
Pneumatically controlled programming and test-

ROSTER' QF ORGANIZATIONS

(>.
";,'

ing devices. Automatic s e 1 e c t i v e typi n g
equipment (Autotypist). Testing machines for
typewriters, adding machines, calcula tin g
machines. . Ms(lOO) Le(1868) Ic RMSa
-American MachIne and Foundry, Electronics Division,
1085 Commonwealth Ave., Boston, Mass. / Algonquin 4-4234 /
*C
Magnetic shift registers, digital data-handlillJ
equipment; servomechanisms to specificatmns.
Digital servo with 215 quantum units per revolution (shaft to digital conversion). Ls(9QO)
Se(1948) Dc RMSa
Amperite Co., Inc., 561 Broadway, New York 12, N.
Y. / Canal 6-1446 /
*C
Delay relays and regulators for comp uters,
etc. Ms(75) Me (1923) Ic RMSa
Ampex Elec tric Corp., 934 Charter St., Red woo d
City, Calif. / Emerson 8-1471 /
*C
Magnetic recording of data. Ls(550) Se(194~
Ic RMSa
Andersen Laboratories, Inc., 39-C Talco t t R0 a d,
West Hartford 10, Conn. / Adams 3-4491 /
*C
Solid ultrasonic delay lines, computer memories, etc., for computer applications. Ss (30)
Se (1950) Ic RMSa
ANelex Corp., Concord, N. H., and 150 Causeway St.,
Boston 14, Mass. / Richmond 2-3400 /
*C
High-speed printer (1800 characters per second), numerical and alpha-numeric up t,o 64
characters and line-lengths up to 120 c ha racters. Ms Se(1952) DIc RMSa
.
Applied Science Corporation of Princeton, P.O.Box
44, Princeton, N. J. / Plainsboro 3-4141 /
*C
Radio telemetering and automatic data convers ion. Devices for automatic and· semi -a u t 0matic reduction and analysis of telemetering
and radar data. Analog read-in and read-out
devices. Digital storage and computi n g
elements. MADA'l (Mul tipurpose Automatic Data
Analysis Machine). Ms(85)
Se(1946)
DAc
RCPMSa
Argonne National Laboratory, Box 299, Lemont,Ill./
Bishop 2-2750, Lemont 800 /
*C
Production of big electronic automatic digital
computers for use of Atomic Energy Commission
only.
?s Se Dc RMa
Arma Corp., Old Country Rd., Garden City, L. I.,
N. Y. / Garden City 3-2000 /
*C
Electronic fire-control apparatus. An a log
computer components including resolvers, induction generators, etc. Basic weapon and
control systems, navigational systems, precision remote control systems.
Automat i c
machine tool and material handling systems.
Analog computer components.
Ls(6000)
Le
DASc RMSPa
Armour Research Foundation, Illinois Inst. of Technology, 10 West 35 St., Chicago 16, Ill. / Calumet 5-9600 /
*C
Magnetic recording. Digital, analog and datahandling equipment. Automatic control machinery. Servomechanisms.
Inst rumentation •
Ls(1200) Me (1936) DASCc RCPa
The Arnold Engineering Co., Marengo, Ill. / Chic*C
ago, Andover 3-6300 /
Magnetic materials for computer components,
etc. Ms(425) Me (1936) Ic RMSa
Askania Regulator Co., 240 E. Ontario St., Chicago,
Ill. / Whitehall 4-3700 /
*C
Hydraulic and electronic automatic cont.rol
equipment. Use analog computers; manufacture

servomechanisms and automatic con t r 0 1 s •
Ms (400) Me (1930) SCc RMSPa
Atomic Instrument Co., 84 Mass. Ave., Cambri d ge
39, Mass. / Eliot 4-4321 /
*C
Analog to digital converters,printers, counter components and controls; shell velocity
computation and recording; etc. Ms(lOO) Se
(1947) DACc RMSCa
Audio Instrument Co., Inc., 133 West 14 St., New
York 11, N.'Y. / Oregon 5-7820 /
*C
Electronic, mechanical, and optical a n a log
computers. Precision electronic instruments.
Time-delay-units from 10 to 10,000 milliseconds. Fire control equipment, logarithmic
amplifiers. Specialized passive com p uter
which corrects for film nonlinearity in photometric work, etc.
Ss(lO) Se(1949) DASCc
RMSCa
The Austin Co., Special Devices Division, 76 9th'
Ave., New York 11, N. Y. / Watkins 4-3630 / *C
Systems and devices for automatic control in
commerce and industry; analog, digital, datahandling, servo, electronic, electr~hanic~
Shaft position indicators and systems; cmnode
ray indicators and systems. Ls(division,l25;
company 25,000) Le (division, 1943, company,
1878) DASCMc RMSa
Automacite Applique, 10 rue Saulnier, Paris ge,
France
Automatic control apparatus. Cc RMSa
Automatic Electric Co. 1033 West Van Bure n St.,
. Chicago 7, Ill. / Haymarket 1-4300 /
*C
Automatic electrical systems, telepmne equipment, relays, stepping switches ,_ etc., for
computing machinery and communications companies. Automatic control components.
Ls
(5700) Le(1892) ICc RMSa
Automatic Signal Division, Eastern In dustrie s,
Inc., Norwalk, Conn.
Automatic volume-density traffic controllers.
Me
Ic RMSa
Automation Consultants, Inc., 1450 Broadway, New
York 18, N. Y. / Chickering 4-7800 /
*C
Consul tants in electronic systems and devices,
including automatic information-h and 1 i n g •
Ss Se(1953)
Dc
Ca
Automation Engineers Co., Division of Associated
Industrial Consultants, 246 West State Street,
Trenton, N. J. / Trenton 3-2603 /
*C
Consul tants in automatic control machinery and
automatic materials handling equipment. Ss
(20)
Me (1942)
DACMc Ca
Avion Instrument Co., Division of American Car
and Foundry Industries, Inc., 299 State Highway
No. 17, Paramus, N. J./ Oradell 8-4100 /
*C
Digital and analog computing machinery. Magnetic recorders, amplifiers, electronic choppers, tes t equi pment, servomechanisms, aut 0 matic control machinery, etc.
Ms(l60) Se
(1946)
DASCMc RMSCPa
Baird Associates, 33 University Road, Ca mbridge
38, Mass. / University 4-0101 /
*C
Spectroscopic analysis equipment; scientific
instruments; analog devices, servo-mechanisms;
transistors. Instrumentation for industrial
control. Research in physical optics.
Ms'
(200)
Me (1937)
AlSc RMSa
Barber-Colman Co., Rockford, Ill.
*C
Automatic controls, textile machinery, machine tools, etc. Barber-Colman-Stib i t z
digital computer, operating.
Ls(3OO0) Le
Dc
RMSa'
- 10 -

ROSTER OF ORGAN! ZATIONS

Beckman Division, Beckman Instruments, Inc., Fullerton, Calif. / Lambert 5-8241 /
~:cC
Multi-channel digital data-handling systems;
200 channel strain gage recorder. Automatic
process control, digital data handling and
recording. Ls(1800) Me (1934) DAlc RMSa
See also Berkeley Division, Beckman Instruments.
'
Bell Telephone Laboratories, Murray Hill, N. J. /
Summi t 6-6000 / and 463 West St., New York 14,
N. Y. / Chelsea 3-1000 /
*C
Automatic switching. Bell general purpose
computers (relay and electronic, digital and
analog) for government use and company's own
use.
Ls
Le
Dk
RGPa
Bendix Aviation Corporation, Computer Divi s ion,
5630 Arbor Vitae St., Los Angeles 45, Calif. /
Oregon 8-2128 /
*C
Electronic information-processing machines.
Electronic computers; data-processing equipment; automatic control systems; Dec i mal
Digi tal Differential Analyzer; general p u rpose digital computers Model G-15A and G-15D.
Ms(150) Se(1952, division; 1929, corporation)
DACc RMSPa
Bendix Aviation Corp., Pacific Division, Nor th
Hollywood, Calif.
*C
Telemetering systems. Digital systems, controls, and components.
Ls(2500)
Le(1915,
company; 1937, this division)
Ic RMSa
Benson-Lehner Corp., 2340 Sawtelle Blvd., West Los
Angeles 64, Calif. / AR-93723, BR-21197 /
*C
Automatic and semi-automatic devices (b 0 th
analog and digital) for computing, data analyzing, data reduction, optical measuring,
guided missile analysis, etc.
Oscillogra m
trace readers, plotters, etc. Com mer cia 1
applications of industrial control devices.
Ms(118)
Se(1950)
DAc RCMSa
Berkeley Division, Beckman Instruments, Inc.,2200
Wright Ave., Richmond, Calif. / Landscape 6-7730
EASE computer (Electronic Analog S i mu lating
Equipment) for solving equations, simulating
systems, etc.' Se
Ac RMSa
Edmund C. Berkeley and Associates, 36 West 11 St.,
New York 11, N. Y. / Algonquin 4-7675 / and,815
Washington St., Newtonville 60, Mass. / Decatur
2-5453 or 2-3928 /
*C
Logical design, applications, marketing, etc.,
of automatic information-handling machinery.
Publisher of "Computers and Automa t ion" •
Small one-of-a-kind computers (Simon) and
robots (Squee); more under constru c t ion.
Courses, publications.
sse 8) Se(1948) Dc
RCMSa
Berkshire Laboratories, 732 Beaver Pond Road,Lincoln, Mass. / Waltham 5-7000 /
*C
Special computer components.
Ss
Se(1949)
lAc RMCa
Birkbeck College, University of London, 21 Torrington Sq., ,London W.C. 1, England / Langham 1912 I
*C

Maker of ARC, APEXC, and SEC digital computersi
electronic digital computers.
Ss(lO to 20)
Se(1946)
Dc RCPa
Boeing Airplane Company, Industrial Products Division, Seattle 14, Wash. / Mohawk 4444 /
*C
Boeing Electronic Analog Computer. Associated non-linear equipment. Complete lin e of
auxiliary equipment, including function generator and electronic multiplier. Ls(37,OOO)
Le(1916)
Ac RMSa
- 11 -

Bradley Laboratories, Inc., 168 Columbus Avenue,
New Haven, Conn. / Main 4-3123 /
*C
Selenium rectifier kits, high temperature
rectifiers. Ms
Me
Ic RMSa
Bri tish Tabulating Machine Co., Ltd., 17 Pa r k
Lane, London W. 1, England / Hyde Park 8155, /
*C
Ls (4500) Le (1908)
Punched card machines.
Dc RCPMSa
Brush Electronics Co., 3405 ~erkins Ave., Cleveland 14, Ohio (formerly Brush Development Co.)
*C
Recording analyzers. Magnetic tape, heads,
and drums. Computer components.
Ls(1300)
Le(1921)
Ic RMSa
Bull S. A. Compagnie des Machines, 94 AvenueGambetta, Paris 20e, France / MEN 8158 /
*C
Punch card machines. Commercial electronic
computers and card-programmed scientificco~
puters. Producing about 10 electronic computers a month; 100 currently in operation.
Ls(2500)
Me (1931)
Dc RMSa
Bureau of the Census, Washington 25, D. C. / *C
,
Tabulation of statistical data by s pe cia 1
machines designed and built for own use, by
commercial punch-card equipment, and by electronic computing system (the Univac). Ls
(1100 in Machine Tabulation Division)
Le
(1890 in punch card field)
Dc Ga
Burlingame Associates, 103 Lafayette St., New York
13, N. Y. / Digby 9-1240 /
*C
Analog computers, servo analyzers, se r v 0 control devices, digital voltmeters, etc.
Ss (35)
Me (1928)
Alc Ca
Burroughs Corporation HUIIaedy BULLouyhs-AdcH-ng·
-Maehfne-€(J."') 6071 Second Ave., Detroit, Mich. /
Triangle 5-2260 / --...fIeadquartersi-,-,,~Rur
Dc
RMSa
'
Massachusetts Institute of Technology, Digital Computer Laboratory, 211 Mass. Ave. / Eliot 4-331V
also Center of Analysis; Cambridge 39, Mass.
''Whirlwind'' electronic digital computer. Ms
(300+)
Se (1945?)
Dk
RCPa
Mathematisch Centrum, 2e Boerhaavesstraat 49, Am- 15 -

ROSTER OF ORGANIZATIONS'

sterdam, Netherlands.
*C
Relay computer in use; electronic com pute r
under construction.
Ms(60) Se(1946) Dc RCPa
The W. L. Maxson Corp., 460 West 34 St., New York
I, N. Y. I Longacre 5-1900 I and elsewhere
Servomechanisms, analog computers, and digital computers for fire control, navigat ion,
etc. Automatic control machinery. Ls(3000)
Me (1935)
DASCc RMSa
Mechanical Handling Systems, Inc., 4600 Nancy Ave.,
Detroit 12, Mich.
Automatic conveyors for moving separate articles, large or small, heavy or light, etc.,
in manufacturing processes. Ls Me Mc RMSa
Mellon Institute of Industrial Research, Multiple
Fellowship on Computer Components, Umversity of
Pittsburgh, Pittsburgh 13, Pa.
*C
Ss (6)
Se (1950)
Dc
RCa
Mid-Century Instrumatic Corp., 611 Broadway, New
York 12, N. Y. I Spring 7-4016 I
*C
Analog computers; six-channel recorders; electronic function generators; e 1 ec t ron i c
multipliers, etc.
Ss(27) Se(1950) Ac RMSa
William Miller Instruments, Inc., 325 No. Halstead
Ave., Pasadena 8, Calif.
Milac analog computer. Electronic instruments
for precision testing and measurement. Ac ~
Minnesota Electronics Corp., 3101 East 4 St., Minneapolis, Minn. I
*C
Digital and analog computers.
Magnetic components, magnetic decision elements.
Da t a
reduction systems, telemetering. Ss(35) Se
(1946)
DAle RMSa
Minneapolis-Honeywell Regulator Co., Indu s trial
Division, 4580 Wayne INe., Philadelphia 44, Pa.1
Michigan 4-8300 I
*C
Automatic controllers. Brown Ins truman t s.
Servo components used in computers. RecordUgand indicating instruments and control equipment, etc. Amplifiers, converters, bruancing
motors, potentiometers, etc.
Ls(3500) Le
(1859)
RMSa
Monrobot Corp., Morris Plains, N. J. I Morristown
4-7200 I
*C
Monrobot automatic electronic digital computers. Subsidiary of Monroe Calculating Machine Co.
Ss(32) Se(1952) Dc RMSa
Monroe Calculating Machine Company, Orange, N. J.I
Orange 3-6600 I and elsewhere.
*C Desk calculating machinery for adding, calculating, and bookkeeping., See also Monrobot
Corp.
Ls(4000)
Le(19l2)
Dc
RMSa
Moore School of Electrical Engineering, Univ. of
Pennsylvania, Philadelphia, Pa. I Evergreen 60100, X9811
*C
Place where Eniac and Edvac electronic digital
computers were constructed. Analog and digital equipment; simulators.
Ms(80)
Me
(1923)
DAc RCPa
F. L. Moseley Co., 409 North Fair Oaks, Pasadena,
Calif. I Ryan 1-8998 I
*C
"Autograf" X-Y Recorder, point plotter, curve
follower, etc.
Ss(30) Se(l95l) Ic RMSa
Mountain Systems, Inc., 94 Lake St., White Plains,
N. Y. I White Plains 9-0714 I
Data processing systems and digital computer
systems.
Ss Se Dc RMSCa
National Bureau of Standards, Applied Mathematics
Division, Washington 25, D. C. I Em 2-4040 I *C
(D Numerical Analysis Section:
Ss (10) Se
(1954) Dc RGa
- 16 -

(2) Computation Laboratory: SEAC (Bureau of
Standards Eastern Automatic Computer) '.
Ms(50) Me (1938) Dc CPGa
(3) Statistical Engineering Laboratory:
Ss
(20) Se(1946) Dc RCPGa
(4) Mathematical Physics Section: Ss(lO) Se
(1954) Dc CPGa
National Bureau of Standards, Electronics Divisio~
Electronic Computers Laboratory, Washington 25,
D. C.

*C

Digital computers, data processing sy stems,
input-output devices. Storage elemen~,tran­
sistors, diodes, delay lines, etc. Have designed and assembled Seac and Dyseac electronic digital computers, etc.
Ms(llO)
Se
(1946)
Dc
RCMBGa
The National Cash Register Co., Electronics Division, 3348 West El Segundo Blvd., Hawth 0 r n e ,
Calif. I Osborne 5-1171 I
*C
Digital computers, data processing machines,
decimal digital differential analyzers, computer components, input-output devices, computing systems. CRC 102-A and 102-0 general
purpose computers and other computers.
Ms
(350)
Se (1950)
Dc
RCMSa
National Co., Inc., 61 Sherman St., Malden, MassJ
Malden 2-7954 I
Communications receivers; some computing equipment.
Ls(700)
Ic RMSa
National Physical Laboratory, Control Mechanisms
and Electronics Division, Teddington, Midllesex,
England.
*C
Digital computers, electronic simulators,data
recording. Designer and builder of the Pi! ot
Model of ACE (Automatic Computing Eng i n e) •
Collaborates with English Electric Co.
Ls
(1000; this division, 40) Le(1900) Dlc RCPMa
Northrop Aircraft Co., Hawthorne, Calif.
*C
Computing center; develops, maintains, operates own computing equipment. Digital plotter. Data reduction and analysis. Development of computing systems on order.
Ms(70
this project) Se (1950 this project) DAc RCPa
Notifier Manufacturing Co., 239 South 11 St.,Lincoln 8, Nebraska I Lincoln 5-2946 I
*C
Automatic control machinery for fire alarms.
Automatic control circuits, computer circuits, switching circuits. Memory and pul se
storing devices, transistor devices. Ss(35)
Se(l949)
Clc RMSCa
Nuclear Development Associates, 80 Gra n d St~,
White Plains, N. Y. I White Plains 8-5800 I *C
Circle Computer design and sales; s pe cia 1
purpose data-handling systems, and sys t e m
design. Associated with Hogan Laboratories.
Ms(lOO)
Se(1948)
Dlc RMSa
Olivetti Corp. of America, 580 Fifth Ave., Ne w
York 36, N. Y. / Judson 2-0637 I and In g. C.
Olivetti & C., S.P.A., Ivrea, Italy.
*C
Desk adding, calculating, and printing machines. Fully automatic printing calculators.
Ls(6000)
Le(1908)
Dc RMSa
Ortho Filter Corp., 196 Albion Ave., Paterson 2,
N. J. I Mulberry 4-5858 I
*C
Pluggable units for computers, ca th 0 de ray
amplifiers, power suppl ies, wiring of complete racks, etc.
Ss(43) Se(1946) Ic RMSa
Panellit, Inc., 7475 North Hamlin Ave., Skoki e,
Ill. I Orchard 5-2500 I
*C
Equipment for automatic control: coordinated
and graphic control panels for process vari-

ROSTER OF ORGANIZATIONS

abIes; multiple-point scanning sys tems, a nnunciator systems.
Ms(375) Se ISCMc RCMSPa
Pennsylvania State College, X-Ray and Solid State
Lab., Dept. of Physics, State College, Pa.
*C
X-RAC computer for crystal elec·tron density.
functions. S-FAG for structure factor interpretations.
Ms(55) Se(1947) Ac RPa
George A. Philbrick Researches, Inc., 230 Congress
St., Boston 10, Mass. / Liberty 2-5464 /
*C
Philbrick electronic analog computing equipment and components.
Ss(5) Se(1946) Ac
RCMSa
Phillips Control Corp., Joliet, Ill. / Joliet 33431 /
*C
Relays for computers, etc.
Ms(350) Se(194@
Ic RMSa
Photon, Inc., 58 Charles St., Cambridge 38, Mass./
Trowbridge 6-1177 /
*C
Machinery for composing type by photographs.
First photographically-composed book has been
published. Ms(lOO) Me (1940) DIe RCMSa
Pitney-Bowes, Inc., Stamford, Conn.
*C
Postage meters. Tax-stamping meters. '~ick­
ometer" counting and/or imprinting machines.
Ls(3000)
Le(1920)
Ic MSa
Potter Instrument Co., 115 Cutter Mill Rd., Great
Neck, N. Y. / Great Neck 2-9532 /
*C
Electronic counters. Magnetic tape handler;
digital pr1nter. Shift registers. Magnetic
core memory. Random access memory.
Hig hspeed printer (''Flying Typewriter "). Analogto-digital converter.
Ms(IOO) Se(1942)
Dc
RMSa
Powers-Samas Accounting Machines, Ltd., Engla n d.
Punch card tabulating equipment using small,
medium, and standard cards. Agency is Underwood Corp., which SEE. Ls(6000)
Le(1916)
Dlc RMSa
Productions Electroniques, 8, rue Laugier, Paris
17, France
Collaborating with Institut Blaise Pascal on
magnetic recording devices.
Ic RMSa
Radio Corporation of .America, Tube Di vi s ion, 415
South 5 St., Harrison, N. J. / Humboldt 5-3900/
*C
Tubes, transistors for computers.
Ls Le
Ic
RMSa
Ramo-Wooldridge Corp., 6214 Manchester Blvd., Los
Angeles 45, Calif.
Digital computers and components, etc.
?s
Se (1954)
Dlc RMSa
The Rand Corporation, 1700 Main St., Sant a Monica,
Calif.
*C
Electronic digital computer (Johnniac) c onstructed and operating.
Ls(600)
Se(1946)
DAlc RCPa
Raytheon Manufacturing Co., Waltham, Mass. / Waltham 5-5860 /
*C
Electronic computer systems for genera 1 accounting and data-processing operations, and
for general scientific applications (RAYDAC).
Magnetic-core coincident-current matrix memory systems, magnetic shift registers, binary
and decade counters, magnetic core log i cal
components and subsystems, tape-handling mechanisms, magnetic recording heads, magneti c
amplifiers. Computing services to a n a 1 y ze
and process problems in operations re search,
applied mathematics, engineering, and general
business accounting by digital com put e r.
Machine control, radar, sonar, communications,
- 17 -

fire control, microwave and telemet e r i n g
equipment, power and receiving tubes, diodes,
transistors.
Ls(20,000) Me(1925) DAc RMSPa
J. B. Rea Co., Inc., 1723 Cloverfield Blvd., Santa Monica, Calif. / Exbrook 3-7201 /
*C
Automatic control systems i high-speed analogto-digi tal converter (Reacon); analog and digital computing facility; etc.
Ms(60)
Se
(1951)
DSCc RMSCa
Reeve sIns trumen t Co., 215 East 91 St., New Yo r k
28, N. Y. / Trafalgar 6-6000 /
.
Fire-control equipment. ''REAC'· electronic
analog computers.
Ls Me Ac RMSa
Remington Rand, Inc., 315 4th Ave., New York 10 ,
N. Y. / Spring 7-8000 / and else~here /
*C
Digital computers (Univac System, ERA 1101
Electronic Computer System, ERA 1103 EI e ctronic Computer System); analog com puters;
special purpose computers. Card-to-tape. and
tape-to-card converters.
Servomechanisms,
magnetic drum storage systems, input and output devices. Adding and calculating machines.
Punched-card accounting machines and othe r
accounting machines, etc.
SEE also EckertMauchly Division and Engineering Rese arc h
Associates Division.
Ls(over 30,000; 1800
on computers)
Le DA'5c RCMSa.
Robotyper Corporation, 125 Allen St., Hendersonville, N. C. / Hendersonville 4246 /
Automatic typing equipment that can be associated with any electric typewriter, using a
record roll pneumatically operated. Ic RMSa
Servo Corporation of America, New Hyde Park, N.Y./
Fieldstone 7-2810 /
*C
Servomechanisms. Automatic controls. Analysis and synthesis for controls manufactu r ers. Temperat4re controls by infra-red radiation. Industrial controls. Servo components
and test equipment. Analog and digital co~
puters.
Ms(350) Se(1946) DA'5Cc RMSa
Servomechanisms, Inc., Post & Stewart Ave., Westbury, L•. 1., N. Y., and 316 Washington St., El
Segundo, Calif. / Westbury 7-2700 and El Segumb
1517 /
*C
Automatic electronic and electro-mec h a n:ical
control systems and components, analog computers, instrumentation.
Ls(700) Se(1946)
AS ICc
RMSa
Shepard Laboratories, Summit, N. J.
High-speed typer (up to 1800 characters per
second).
Ss Se(1950) Dlc RMSa
Societe d'Electronique et d'Automatisme, 138 Blvd
de Verdun, Courbevoie, Seine, France / Defen se
41-20 / '*C
Analog and digital computers and components.
Servomechanisms; electronic equipment for
machine tools; electronic recorders. Analog
computer OME-L2. General purpose digital computer CAB 2.022. Ms(320) Se(1948) DA'5c RMSa
Societe des Servomechanismes Electroniques, 1 rue
Chanez, Paris 16e, France
Sc RMSa
.Soroban Engineering, Inc., Box 117, Melbourne, Fla.
Electronic digital computers of the FLAG and
SEAL type; computer auxiliaries such as mghspeed tape perforators (240 characters per
second), coded automatic keyboards, automatic
format tabulators, etc. Ss Se(1953) Dc RMSa
Southern Electronics Corporation, 239 West Orange
Grove Ave., Burbank, Calif. / Victoria 9-3193 /
*C

ROSTER OF ORGANIZATIONS

Ss(55)
Precision polystyrene capacitors.
Se(1951) Ic RMSa
Sperry Gyroscope Co., Great Neck, N. Y. / Fieldstone 7-3600 I
*C
Ordnance; fire-control equipment. Automatic
controls. Navigation equipment, sea and air.
Radar, Loran, gyrocompass~s, precisi 0 n instruments.
Ls(18,000) Le(1910) Ac RMSa
Sprague Electric Co., 377 Marshall Street, North
Adams, Mass.
*C
Capaci tors: miniature, and low diele c t ric
hysteresis loss ,for computer applications.
Standard capacitors; precision and power type
resistors; pulse transformers; radio interference filters; printed circuits. Ls(5OO0)
Le(1926)
Ic RMSa
Swedish Board for Computing Machinery, Drottninggatan 95A, (P. O. Box 6131), Stockholm 6, Sweden I Stockholm 23 55 90 I
*C
State central institution for research, development, and computation service on largescale machines. Operates two computers, BARK
and BESK, designed and buH t by the Bo a rd.
They have run commercially, BARK since Ju 1 y
1950, and BESK since March 1954.
BARK is a
binary, automatic relay computer, orders set
up on a plug-board, parallel-operating,three(four-) address system. BESK is a binary,
electronic sequence computer, storing orders
and data in a parallel Williams memory or in
a magnetic drum memory, one-address sys te m,
parallel-operating. Research on nume ric a 1
analysis; development of new computers.
Ss
(30)
Se(1949)
Dc RMCPa
Sylvania Electric Co~, Radio and Television Div.,
70 Forsyth St., Boston 15, Mass. I Kenmore 68900 I and elsewhere.
*C
Electronic digital computers us in g printed
circuit techniques. Subassemblies of diodes
and triodes •. Computer components. Ls(22oo;
this division 190) Le mputer for problems in which the precision 0 f
the computer is greater than the accuracy of
the input data. They can handle almos tal I
dynamic problems because the information needed
is the presence of instability or the design
of devices to prevent instability and not the
numerical solutions.
The limitations of analog computers ar e
that the equations for the original system or
the transfer functions of the elements or components of the original system must be known,
that a considerable amount of time mus t b e
allowed for setup of the computation schedule
and analysis of results, and that· the computing elements themselves, even though they may
possess amazing versatility, have phys i c a I
1 imi tations. Some problems are not complicated
enough to justify treatment by such an elaborate means. First cost is a consideration but
the first cost of analog computers is low among computers. Analog computers are fundamentally calculus machines and are therefore,
of course, inappropriate for basically arithmetical calculations such as census taking or
cost accounting.

Some Large-Scale Computers and
Their Applications
Large-scale general-purpose computers incl ude the differential analyzer at the Mas sachusetts Institute of Technology, various d-c
and a-c network analyzers, and similar analog
computers operated by the Westinghouse Electric
Corporation and the California Institu teo f
Technology.
The MIT differential analyzer is use d
primarily for evaluatin~ solutions of ordinary
differential equations. 5 It is a mechanical
device and the values of the variables involved
are represented by positions of rotating shafts
or by shaft rates. It has been used for solutions to problems in many branches of enginee~
ing and science and has stimulated activit yin
the fields of mathematical effort where p r 0cesses of analysis are inadequate.
Network analyzers have been used to solve

- 22 -

,A~ALOG

COMPUTERS

quickly the many and various problems concerned
They
with the operation of power systems. 44
are practical, adj ustable miniature pO\\er systems. They can be used to analyze re suI t s
during the progress of a system stu d y and
therefore play an active part in system planning as well as checking the perform an c e of
completed systems.
The electrical analog computers at Cal
Tech and at Westinghouse (the Anacom) were constructed after a two year survey. 30 Vario u s
types of auxiliary equipment has been designai
for use with these computers and the computers
themsel ves are made up of many specially developed components. 45 A block diagram of a typical computer setup for solving a problem could
consist of three blocks. 37 The first would be
the steady~state or trans ient forcing functions.
Electrical voltages are generated and applied
to the analog which are equivalent to the forces
applied to the actual physical system. The second block is the electrical analog of the system studied. Many analogs of different problems
are already known and methods have been developed for systematically determining new one s •
The third block is the measuring e qui pment ,
which includes oscillographic apparatu s for
transient problems. The exact type of measuring equipment will vary with each individual
analysis. These computers have been us e d to
sol ve a wide variety of proglems inc 1 u din g
magnetic amplifier studies,
nonlinear mechanics and servomechanisms inve8ti gati 0 n, 95
transient ~ibration problems, 7 re g u 1 a tor
problems ,2 the study of a steel mill drive, 35
and the study of a.lubrication system. 45
Electronic Analog Computers and
Their Applications

D-C

Computations, which are too extensive to
be undertaken manually and not so elaborate as
to justify using the facilities of a computation laboratory, can be handled easily and are·
quately by small, compact d-c electronic analog computers. Such computers can be COnstIUCted or ~lJn be purch~fe~ifrom manufacturers like
Philbrick. and Boein~
Reeves,
Goodyear, '
They are easy to operate, easy to maintain and
service, and relatively inexpensive. The parameters can be changed easily and the time required for setup is short in comparison with
other types of computers. Additional uni~ can
be added easily to extend the capacity of the
machine and make it more versatile.
Such a
machine permits convenient and economical testing by straightforward techniques and is an effective tool in the hands of those who under st~nd i~~ capabilities, advantages, and limitatlons.
.

(1) Obtain a complete statement of the
problem. This would include the equations to
be solved, the ini tial conditions,' the par ameters to be varied, any available solutionsor
checks, numerical values of the .parameters, mrl
the estimated ranges of the variables and ilieir
derivatives if possible. Since this computer
is an operational analog, a given system c an be
studied only if its response equations
ar e
known.
(2) Determine tentative scale factors for
each variable and set up the trans for mat ion
e'luations. These equations express the relationship between the problem variables am the
computer variables.
(3) Choose the time scale and write the
transformation equation for the independe n t
variable (time). The computer time mayre equal
to, slower than, or faster than real time. Do
not forget to transform initial conditions, limiting levels, etc., to computer variables.
(4) Establish the machine equations
draw a computer block diagram.

and

(5) Interconnect the computing eleme n t s
by patch cords to perform the operations required.
(6) Set potentiometers, initial values,
limiting levels, and function generators according to the block diagram. Set or check recorder calibration.
(7) Make the computing devices operative
and thereby force the voltages in the machine
to vary in the manner prescribed by the machine
equations. The vol tage variations with ti me
are recorded and constitute the solutions 0 f
the problem. The machine is stopped at a time
chosen by the operator. The maximum allowable
computing time is usually determined by the
1 imi tations of the computing elements. Chec k
operation for consistency by means of standard
built-in test signals.
(8) Reset the machine for the next run
with changed coefficients, initial conditions,
etc.

(9)

Obtain all the data required.

(10) Reduce, the data and analyze and report
the test results.

In general, the following steps should be
followed in handling a problem: 33
- 23 -

- TO BE CONTINUED -

Automatic Computing Machinery - List of Types
(Edition 1, cumulative, information as of Oct. 3, 1954)

The purpose of this list is to report types of
machinery that may well be considered automctic
computing machinery, that is, automatic machinery for handling information or data,reasonOOly.
No objective criterion as to whether or not any
particular type should or should not be included
has yet been determined. We shall be grateful
for any comments, corrections, and pro p 0 sed
additions or deletions which any reader may be
able to send us.
LIST
Accounting-bookkeeping machines, which takein
numbers through a keyboard, and print them
on a ledger sheet, but are control 1 e d by
"program bars" t which according to the colllIl1
in which the number belongs, causes the number to enter positively or negatively in any
one of several totaling counters, which can
be optionally printed or cleared.
Analog computers, which take in numerical information in the form of measurements 0 f
physical variables, perform arithmetic a 1
operations, are controlled by apr og ram,
and give out numerical answers.
Astronomical telescope aiming equipment,which
adjusts the direction of a telescope in an
observatory so that it remains p()int e d at
the small section of the heavens which a n
astronomer intends to study.
Automobile traffic light controllers, that take
in indications of the presence of mot 0 r
cars from the operation of treadles in the
pavement or in other ways, and g i v e 0 u t
signals, according to a program of response
to the volume and density of traffic.
Control systems for handling connected or flowing materials, which will take in indications
of flow, temperature, pressure, volume,liquid level, etc., and give out the settings
of valves, rollers, tension arms, etc.,depending on the program of control.
Control systems for handl ing separate materials,
which will move heavy blocks, long rods, or
other pieces of material to or from stations
and in or out of machines, while taking in
indications furnished by the locations of
previous pieces of material, the availabili ty of the machines, etc., all depending on
the program of control.
Data sampling systems, which will take i n a
continuous voltage or other physical variable and give out samples, perhaps onc e a

second or perhaps a thousand times a second;
this machine may be combined with an analogto-digital converter, so that the reporton
the sample is digital not analog.
Digital computers, which take in numerical,alphabetic, or o'ther information in the form
of characters or patterns of yes-noes, etc.,
perform arithmetical and logical operations,
are controlled by a program, and pu t 0 u t
. information in any form.
Digital-to-analog converters, which will take
in digital numbers and give out a n a log
measurements.
Facsimile copying equipment, which s can s a
document or picture with a phototube 1 in e
by line and reproduces it by making little
dots with a moving stylus or with an electric current through electrosensitive paper.
Flight simulators, which will take insimulated
conditions of flight in airplanes, and the
actions of airplane crew members, and show
the necessary results, all for purposes of
training airplane crews.
Fire control equipment, that takes in indications of targets from optical or radarperception and puts out directions of bearing
and elevation for aiming and time of firing
for guns, according to a program that calculates motion of target, motion of the firing
vehicle, properties of the air, etc.
File-searching machines, which will take in an
abstract in code and find the reference alluded to.
Game-playing machines, in which the mac h i ne
will play a game with a human being, either
a simple game such as tic-tac-toe or n i m
(which have been buil t into special machines)
or a more complicated game such as checkers,
chess or billiards (which have been programmed on large automatic digital computers.
Inventory machines, which will store as man y
as ten thousand totals in an equal numbe r
of registers, and will add into, s ubtr act
from, clear, and report the contents of any
called-for register (these machines app 1 y
to stock control, to railroad and airline
reservations, etc.).
Machine tool control equipment, which takes in
a program of instructions equivalent to a
blueprint, or a small size model, or the pattern of operations of an expert machinis t ,
and controls a machine tool so that a piece
of material is shaped exactly in accordance
with the program.
- 24 -

AUTOMATIC

OOMPl~ING

MACHINERY

Nav igation and piloting sys terns, whi c h will
take in star pos i tions, time, radio be a m
signals, motion of the air, etc., and deliver steering directions.

Digital
Computer
Techniques

Printing devices of high speed, which will take
in punched cards or magnetic tape and put
out printed information at rates from 600
to 2000 characters per second.
Punch card machines, which will sort, class ify,
list, total, copy, print, and do many other
kinds of office work.
Railway signaling equipment, which for example
enables a large railroad terminal to schedule trains in and out every 20 seconds duriDJ
rus h h ours wi th no acc idents and almos t n 0
delays.
Reading and recognizing machines, which sea n
a printed figure or letter, observe a pattern of spots, route the pattern th r 0 u gh
classifying circuits, recognize the figure
or letter, and activate output devices accordingly.

Electronic Business Systems
Military Radar Fire
Control Systems
Aircraft Control and
Navigation Systems

Applied to
the design,
development
and
application

01

The successful application of
Hughes airborne digital computers to high
speed aircraft fire cOlltrol problems has
opened lip lIll entire new area for these
digital compllter techniques.
Similar equipment is now under development
in the Advanced Electronics Laboratory
to apply such digital computer systems to modern
business information handling.

Spectroscopic analyzers, which will vaporize
a small sample of material, ana 1 y z e its
spectrum, and report the presence and th e
relative quantities of the chemical elements
in it.
Strategy machines, which enable military officers in training to play war games and test
strategies, in which electronic de vic e s
automatically apply attrition rates to the
fighting forces being used in the gam e ,
growth rates to the industrial potential of the two sides, etc.

I

Areas include

Telemetering transmitting and receiving devices,
which enable a weather balloon or a 'guided
missile to transmit information detected by
instruments within it as it moves; the information is recorded usually on magnetic
tape in such fashion that it can late r 'be
used for computing purposes.
Telephone equipment including switching, which
enables a subscriber to dial anothe r s ubscriber and get connected automatically.
Telephone message accounting systems, which record local and long distance telephone calls,
assign them to the proper subscriber's account, and compute and print the telephone
bills.
Test-scoring machines, which will take in a test
paper completed with a pencil rna kin g electrically conductive marks, and will give out
the score.
Toll recording equipment, which will r e cor d,
check, and summarize tolls for bridges,highways and turnpikes.
Typing machines of high speed, which will store
paragraphs, and combine them according t 0
instructions into correspondence 0 r form
let ters, stopping and waiting for man u a 1
"fill-ins" if so instructed.

I

LOGICAL DESIGN
COMPONENT DEVELOPMENT
PROGRAMMING
MAGNETIC RECORDING
CIRCUIT DESIGN
INPUT & OUTPUT DEVICES
SYSTEMS ANALYSIS

Hughes developments in these fields
are creating new positions in the
Advanced Electronics Laboratory.
Exceptional men in the
fol/owing spheres 0/ endeavor
are invited to apply:

-------f

Engineers
and Physicists

Computer activities embrace systems planning
and analysis, design and development, system
engineering and component development. Experience in these areas. as well as in application of
electronic digital computers. is desirable but not
essential. Analytically inclined men with backgrounds in systems work are required for this
phase.

SCientific
and
Engineering
Staff

(continued on page 30)

Hughes
RESEARCH AND DEVELOPMENT LABORATORIES
Culver City, Los Angeles County, California
Assurance is required that relocation of the applicant
will not cause disruption of an urgent military project.

- 25 -

PATENTS
Hans Schroeder
Milwaukee, Wisconsin

The following is a compilation of patents
pertaining to computers and associated equipment from the Official Gazette of the United
States Patent Office, dates of issue as indicated. Each entry consists of: patent numberl
inventor(s) 1 assignee 1 invention.

2,688,724 ;. W H Newell, Mount Vernon, NY/Sperry Corp / Magnetic amplifier
2,688,739 1 R Hofgaard, Nordstrandshogda, near
Os 1'0 , Norway 1 - / Process and apparatus for
the code recording and the sens ing of d a t a
on record cards having a metal film surface

August 3, 1954 (issue now received): 2,685,4071
A A Robinson, Scunthorpe, England 1 Natl Research Development Corp, London, Eng 1 Multiplying circuit for binary numbers
2,685,409 1 F G S English, Chipstead, and M
C P Hewitt, Workingham, England 1 PowersSamas Accountg Machines, Ltd, London, Eng 1
Machine for sensing ferromagnetic marks on
statistical record cards

September 14, 1954: 2,689,300 1 R M MOberman,
and A Snijders, The Hague, Netherlands 1 - 1
Voltage interval multiplier
2,689,301 1 A M Skellett, Madison, N J 1 Nat 1
Union Radio Corp, Newark, N J 1 Cathode ray
type signal storage device
2,689,319 1 WW Shannon~ Glenwood Landing,R F
Redemske, Huntington Bay Hills, and'G M Attura, Levittown, N Y 1 Servomechanisms, Inc,
Mineola, N Y 1 Servo system
2,689,320 1 J P Aloisio, Somerville,Massl Raytheon Mfg Co, Newton, Mass 1 DC-motor speed
control system using saturable reactors

August 24, 1954: 2,687,474 1 W F Richmond,Jr,
Towson, Md 1 Glenn L Martin Co, Middle River,
Md 1 Integrating circuit using vacuum tubes
in conjunction with an R-C circuit
2,687,492 1 C S Szegho and W 0 Reed, Chicago,
III 1 Rauland Corp 1 Cathode ray type signal
storage tube comprising a two-sided t arg et
and two electron guns
2,687,503 1 G M Attura, Levittown, N Y1 Servomechanisms, Inc, Mineola, N Y 1 Modulating
device and amplifier for electric servo system
August 31. 1954: 2,687,850 1 D Gold, Washington, D C 1 - I Computer for determining gun
aim

:0: - - - - - - - - - :0: - - - - - - - - -

*

Forum
ASSEMBLY LINE CONTROL BY PUNCHED CARDS
George W. Patterson
Burroughs Corp., Paoli, Pa.
To the Editor:

September 7, 1954: 2,688,440 1 J W GraY,Whlte
Plains, and E B Hales, Hawthorne, N YI General Precision Laboratory, Inc 1 E1 e c t romechanical great circle computer
2,688,442 1 M E Droz, New York, NY, and WRoth,
Cambridge, Mass 1 USA, Secy of the Navy 1
Electromechanical computer for continuous
summation of vector quantities
2,688,681 1 E Nyyssonen (sic), Watertown,Massl
USA Secy of the Air Force 1 Wirewound potentiometer, resistance of which varies with
the square of the displacement of the slider
2,688,695 1 A D Odell, Aldwych, London, Eng 1
IntI Standard Electric Corp, NY, N Y/Electrical switching circuit using a vacuum tube
2,688,696 1 P E Reeves, Midland, Mich / - 1
'Pulse generating circuit
2,688,697 1 J L Lawson, Schenectady, N Y, L B
Linford, Belmont, Mass, and H L Johnson,De~
ver, Colo 1 USA, Secy of the Navy 1 Pulse
stretcher circuit
2,688,.723 1 D T Kadushin, Brooklyn, and H Kaplan,
New York, N Y 1 Sperry Corp 1 Two-stage magnetic amplifier

In connection with your bibliography on
automation, YO,u might be interested in the interesting assembly-line control by pun c h e d
cards which has been installed at the Au s tin
Motor Company in England. The punched-c a r d
equipment was supplied by British Tab u lating
Machines, Ltd. Literature references are as
follows:

- 26 -

''The Machine Takes Charge", publ ish ed
in Scope, Magazine for Industry for September, 1952. Creative Journals Ltd.,
9 Grosvenor Street, London, W.l, Eng.
"The New Technique Synchronizes Feeder
Conveyors With Main Production Line by
Punched Card Control", published in Mechanical Handling.for October, 1951. The
Baynard Press, London S.W. 9, Eng.
"A Maj or Development in Conveyor Technique and Stock and Production Control",
published in The Machinist for September 8, 1951. (Geo. W. King Ltd., Hitchin, Herts, Eng. source of reprint).

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- 21 -

NOR TH

A D AM 5 ,

MAS

s.

Forum
ALL-TRANSISTOR COMPUTER
Neil Macdonald
New York
On October 7 in Poughkeepsie, N. Y., International Business Machines Corporation exhibi ted to the press their new experime n t al
electronic computer using transistors.

over 2000 are now in use). The speed of the
new machine is comparable to the speed of the
Type 604. The experimental engineering model
is believed by IBM to be the first fully operating transistorized computer having automatic
input and output. It contains over 2200 transistors, many of them of a design develo pe d
by the IBM engineers to meet certain operatlig
characteristics required in computer circuits.
A transistor's longer life than a vacuum tube
is another expected saving.
Printed circuits express a great deal of
the wiring of the transistorized computer,and
it contains 595 printed wiring panels. Man y
of them show in the accompanying photographs.

The transistor computer is about one half
the size and requires only a twentieth of the
power of a simila r vacuum tube compu t e r.
The new computer is comparable in capacity to
the IBM Type 604 electronic computer (of which

*.-----------------------------------------*-----------------------------------------*
Figure 1. IBM's new experimental transistorized computer is composed of a high-speed punching unit,
left, and the transistorized calculating unit at right. The calculating unit is uncovered
to show the bank of printed wiring panels on which the transistors are mounted.

- 28 -

FORUM

Figure 2. This bank of printed wiri ng
panels in IBM's experimental "all-transistor" computer replaces much of thewiring
required for the computing circuits of
conventional computers. Mounted on t~
panels are many of the more than 2,2 00
transistors used in'the machine.

Figure 3. These printed wIrIng panels,
used in IBM's experimental transistor
computer to s impl ify produc ti on and
maintenance, also reduce space ~quired.
Devices mounted on the panel held in the
hand incl ude trans istors (at the extreme
left), diodes, and resistors. The model
contains 595 of these panels.

- 29 -

POSTER OF ORGANIZATIONS

COMPUTERS IN GREAT BRITAIN
(continued f~om page 8)

(continued from page 19)

Konrad Zuse, Kreis Htinfeld No. 69, Neukirche n,
Germany
Electronic digital computers. Has made Zuse
Model IV and V computers.
Ss(90) Se (1949)
Dc
RMSa

we have been privileged to lead the way.
Speaking personally for a moment, I have
been impressed by the warmth of the personal
friendships on both sides of the Atlantic,and
across the Atlantic, that have grown up within
this computing fraternity. The only regr e t
that can be expressed is that the Atlantic is
so wide.

- END -

*-----------------------*------------------------*
AUTOMATIC COMPUTING MACHINERY
(continued from page 25)

-00-

Vending machines, which will accept different
coins, make change, give out coffee, soft
drinks, sandwiches, candy, stockings, and
a host of other articles, or else allow
somebody to play a game for a certain number of plays, etc.
- END -

*----------------------------------------------------------*-----------------------------------------------------*
Page 1

Read the instructions
on page 2 of this form.

Form 3526

Rev. 3-60

STATEMENT REQUIRED BY THE ACT OF AUGUST 24, 1912, AS AMENDED BY THE ACTS
OF MARCH 3, 1933, AND JULY 2,1946 (Title 39, United States Code, Section 233) SHOWING
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•_______________________________g_9.I!l~~~~~___~ __~~1i_~~~_9JJ. ___________________________________ published ____~QP-.~hly--------------------

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(Insert eXNt~.\}t va~~~
at _______________ , ______________ • ________________________________________________________________________ for ___________

O_C_I______.___1.95.4__,19______
(Staj exact frequency of issue)

(Name of post office and State where publication has second-class entry)

1. The names and addresses of the publisher, editor, managing· editor, and business managers are:

Name

Address

Publisher __ ~W]._g.___g_,__ ~_~_~!!:.~J_~Y_ __@_4__A§_~_Q_(t~_~_'\i_~_~____________
Editor __ ••_.• _________ ~ __~_~___~_!___~_~.!"~~_~_~ __________________ .__________

_____. __. .3.Q_l'{~~_t __U, __S_t.... _lJ_er!.. __Yo.rk_ll..-N • Y.

__________ .3_~_.!~!:l_~ __~~ __~_~!_.__ J.!~_.IQ~_~_JJ..,--N •Y.

Managing editor __ ~------------.-.---.-~-?~.~------------------------- ______________ _
Business manager ______________ ~_____ nQlle_________________________ . _____________ .
2. The owner is: (If owned by a corporation, its name and address must be stated and also immediately thereunder the
names and addresses of stockholders owning or holding 1 percent or more of total amount of stock. If not owned by a
corporation, the names and addresses of the individual owners must be given. If owned by a partnership or other unincorporated firm, its name and address, as well as that of each individual member, must be given.)

Name

Address

_. ____._.._~~ __ Q~ __!!~!:~~J:~. ___ ._.___.._._.._. __._________.__

________._3p__!!~§]__ 11_Jtt;_~~ __Nm!__ X'Qr&__ .l.l~.-N.aY....------

3. The known bondholders, mortgagees, and other security holders owning or holding 1 percent or more of total amount
of bonds, mortgages, or other securities are: (If there are none, so state.)

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__._________..__"..none. __._.___.__________.._____._________.... ___ .______._._

4. Paragraphs 2 and 3 include, in eases where the stockholder or security holder appears upon the books of the company
as trustee or in any other fiduciary relation, the name of the person or corporation for whom such trustee is acting; also the
statements in the two paragraphs show the affiant's full knowledge and belief as to the circumstances and conditions under
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5. The average number of copies of each issue of this publication sold or distributed, through the mails or otherwise, to
paid subscribers during the 12 months preceding the date shown above was: (This information is required from daily,
weekly; semiweekly, and triweekly newspapers only.) ___ ••_~ _________________________ _

~~C_~'
-------------------------------------------------------------------------------(ShrnBture of editor, publisher. bUlln.s. manager,
owner)
Sworn to and subscribed before me this

[SEAL]

--------'-~~____ ••_.__ ~day of •______~_~.P~_~R_~_~___._________.___., 19 __~

_____.________ l_~Ang._g.Q}t~JL _____...___..____...,____.___ ~ _____________ _
Notary Fubl1o,Stateof" New York, No. 24-57~9800
(My commission expires •••• _MAI'~tL~Q___ •• ____ • 19~_.)

-30

andersen SOLID' ULTRA-SONIC DELAY LINES
Andersen solid ultrasonic delay lines offer proven advantages for
pulse storage in digital computers and special instruments.

DELAY TIMES: 1 to 3300 microseconds.
BANDWIDTHS: Up to 100% of the carrier frequency in some cases.
INSERTION LOSSES: Usually specified between 25 and 60 db.
CARRIER FREQUENCIES: From 5 to 70 mc.
Specifications for a typical computer line, in production: 384.6
microseconds delay; 30 mc. carrier, with 7 mc. bandwidth; insertion
loss 48 db, with all spurious signals down at least 34 db with
respect to desired signals.
Do you have a problem in ultrasonics? Write today for new bulletin
on solid ultrasonic delay lines.

Andersen engineers will be
glad to design delay lines to
meet your specifications, or
assist you with special research.

39-C Talcott Road
WEST HARTFORD 10, CONN.
Phone ADams 3-4491

*----------------------------------------------- * -------------------------------------------- •

-31-

PUBLICATIONS:
DRIEF -

Symbolic

Logic,

Computers,

Robots,

etc.

FILLED WITH INFORMATION - CLEAR - SCIENTIFIC RETURNABLE WITIUN WEEK FOR FULL REFUND

You can see them for the asking -- Why not take a look at them?
P 5: BOOLEAN M..GEBRA (THE lECHNIQUE FOR MANIPULAT~
ING 'AND', 'OR', 'NOT', AND CONDITIONS) AND APPLICATIONS TO INSURANCE: also DISCUSSION. Reprint •.
Explains in simple language: what Boolean algebra
is; how to recognize the relations of Boruean algebra when expressed in ordinary words; a nd how to
calculate with it. Contains problems, solutions,
comments, discussion.
• ••••$1.50
P 4: A SUMMARY OF SYMBOLIC LOGIC AND ITS PRACTICAL
APPLICATIONS. Report. Rules for calculating with
Boolean algebra.' Other parts of symbolic log i c."
Applications of Boolean algebra to computing machinery, circuits, and contracts.
Many complete
problems and solutions.
• •••• $2.00
P 14: CIRCUIT ALGEBRA -- INmODUCTION.
Report.
Explains simply a new algebra (Boolean algeb r a
modified to include time) that applies to on-off

circuits,_using relays, electronic tubes, rectifiers, gates, flip-flops, delay lines, etc. Covers
both static and sequential circuits. Applications
to control, programming, and computing. Problems
and solutions involving circuits.
• •••• $1.90

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815 Washington St., RI05, Newtonville 60, Mass.
Please send me your publications circled
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- 32 -

Mathematical Analyst Keith Kersery loads
jet transport flutter problem into one
of Lockheed's two 701 'so On order: two
704's to help keep Lockheed in forefront of numerical analysis and production control data processing.

The first airframe manufacturer to order and receive a 701 digital
computer, Lockheed has now received a second 701
to handle a constantly increasing computing work load.
It gives Lockheed the largest installation of digital computing
machines in private industry.

New 701's speed
Lockheed research in
numerical analysis

Most of the work in process is classified. However, two significant
features to the career-minded Mathematical Analyst are: 1) the
wide variety of assignments caused by Lockheed's diversification
and 2) the advanced nature of the work, which consists mainly
of developing new approaches to aeronautical problems.

Career Opportunities for Mathematical Analysts
Lockheed's expanding development program in nuclear energy,
turbo-prop and jet transports, radar sem-ch planes, supersonic aircraft
and other classified projects has created a number of openings for
Mathematical Analysts to work on the 701'8.
Lockheed offers you attractive salaries; generous travel and moving
allowances; an opportunity to enjoy Southern California life; and an
extremely wide range of employee benefits which add approximately
14% to each engineer's salary in the form of insurance,
retirement pension, siCk leave with pay, etc.
Those interested are invited to write E. W. Des Lauriers for a brochure
describing life and work at Lockheed and an application form.

LOC KHEED
CALIFORNIA

A IRe R AFT COR PO RAT ION

BURBANK

- 33 -

COMPUTERS AND AUT,O.M,ATION- Back Copies & Reprints
Glossaries o~ Terms: More Discussion -- Nathaniei Rochester,. Willis H. Ware, Grace M.
Hopper and Others
.&!ill: Processing Information Using a Common
Machine Language: The American ~anagement
Association Conference, February, 1954
Neil Macdonald
The Concept of Thinking - Elliot L. Gruenberg
General Purpose Robots -- Lawrence M. Clark
May: Ferrite Memory Devices -- Ephraim GelbaIdmd
William 01 ander
Flight Simulators -- Alfred Pfanstiehl
Autonomy and Self Repair for Computers -- Elliot
L. Gruenberg
A Glossary of Computer Terminology - Grace M.
Hopper
July: Human Factors in the Des i g n of Electronic
Computers - John Bridgewater
What is a Computer? ~- Neil Macdonald
September: Computer Failures -- Autcrnatic Internal
Diagnosis (AID) -- Neil Macdonald
The Cos t of Programming and C
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MAIN INTERESTS:
( ) Design
( ) Construction
( ) Applications

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( ) Programming
( ) Other (specify):

College or last school ? ...............................................................................................................:...........

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Year of entering the computing machinery field ? ........................................................................ .
Occupation? ... ___________ .. ______ . _______________ ._ .. _.. ______ ._ .. _____ . __ .... ___ ._._ .. ____ .... _._... (Enclose more
. Info,rmation about yourself if you wish - it will help in- your listing.)

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----~----

~NROBOT

ELECTRONIC CALCULATOR

The MONROBOT is a general purpose digital computer,
compact,
ruggedized, reliable and reasonably priced.
In the MONROBOT, decimal numbers are used. Since twenty
digits are available,
with a centrally located decimal
point, there is no need for scaling or setting of decimal
point.
Neither overflow nor translation techniques are
necessary.
Orders are wri tten -for
the calculator in
virtually their original algebraic form.
Neither highly trained personnel nor
extensive
training effort are needed for the MONROBOT. Keyboard and
automatic tape operations are counterparts of the simple
programming procedures.
Average office personnel become
familiar with MONROBOT operation the first day. It prints
out results on 8-1/2" wide paper roll, or perforates a
paper tape as desired.
MONROBOT V is complete in one desk-size unit, ready
to plug in and perform.
MONROBOTS can be supplied with
capacities to suit special requirements, avoiding excess
investment for unnecessary facilities.

MONROBOT CORPORATION
NEW JERSEY_

MORRIS PLAINS
A

SUBSIDIARY

OF

MONROE

CALCULATING

- 39 -

MACHINE

COMPANY

BASIC CHARACTERISTICS OF
TYPE lOZ PULSE TRANSFORMERS

As a new li'ne of reliable components for
digital computers, Sprague ,has introduced
and is in production on pulse ' transformers
of a new type. This transformer line is principally directed to high speed, low power
computer circuits, with some designs also
finding application in blocking oscillator
circuits, memory ring drivingdrcuits, etc.
Two major types are offered: a miniature
transformer, Type 10Z, for 0.05 to 0.5
microsecond pulse circuits, . and a larger
transformer, Type 20Z, for handling pulses
up to 20 microseconds in length. Intermediate sizes and plug-in units are also available for special customer requirements.
Basic data on the high reliability miniature tr~nsformer is tabulated at right.
Complete details are in Engineering Bulletin M 502. A copy will be sent you on
letterhead request to the Sprague Electric
Company, 377 Marshall Street, North
Adams, Massachusetts.

WORLD'S
LARGEST
CAPACITOR
MANUFACTURER

Pulse
Duration

.OS to O.S microseconds.

Applications

flipflop circuits • buffer circuits
pulse amplifier circuits· gating circuits • other circuits with pulse
lengths up to about O.S microseconds.

Physical
Description

Hermetically sealed. Housed in cor·
rosion-resistant can with glass-tometal solder-seal terminals at each
end. Can length is JA" and diameter
is 1f2". Transformers can be mounted
and supported by lead wires in most
appl ications.

Ratios
Offered

Ratio 1:1 - Cat-No. lOZ3
Ratio 2:1- Cat. No. 10ZS
Ratio 3:1 - Cat. No. 10Z4
Ratio 4:1 - Cat. No. 10Z2
Ratio S:1 - Cat. No. lOll
Special Ratios Available

,

,

Maximum
Repetition
Rate

Fora pulse length of 0.1 microsec·
ond, pulse repetition rates up to 2
megacycles per second can be employed.

Pulse
Amplitude

Normally used in circuits whose pulse
amplitude varies up to 60 volts.

D-C
Rating

Maximum working voltage, 300VDC.
Flash tested between windings at
600VDC. May be life tested at 4S0
VDC between windings, 8SoC, for2S0
hours.

Temperature

May be operated between -SsoC and
+8SoC. Higher temperature units
available on request.

Insulation
Resistance

20,000 megohms minimum between
windings, measured at 2S0C and
180 Volts DC.

SPRnH GUE

.



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