195912

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1959 PICTORIAL REPORT ON THE COMPUTER FIELD
DECEMBER
1959

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VOL.• 8 - NO. 12

Maintenance Methods for Digital Computers

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COMPUTER PROGRAMMERS

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Contribute to the f"ormulation
of Ootally New Oechniques :J{pplicable
to ..carge-Scale Systems at

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MITRE

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MIT~E, formed under the sponsorship of the Massachusetts Institute of Technology,
has as a primary responsibility the design and development of computer-based air defense
systems. An important part 01 this effort is the lonnulation 01 totally new programming

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techniques.

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Supported by such computer equipment as an IBM 704 and an experimental SAGE
AN/FSQ-7 (soon to be augmented by an IBM 7090 and a solid state SAGE computer)
MITRE engineers and scientists are involved in broad applied and creative programming
areas. A significant part of this effort involves the development of computer programs to:

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• Provide simulation vehicles for testing missiles,
interceptors, guidance systems .and tracking procedures
• Carry out data reduction and analyses
• Assist in the study of man-machine relations
• Assist in the design and evaluatiou of new systems
• Check out equipment and subsystems
Additionally, MITRE has undertaken a number of challenging projects in the study of
machine design and programming research; programming systems are being developed
to provide more efficient techniques that will facilitate the writing, testing, operation and
modification of large programming systems such as SAGE.
There are career openings for systems-oriented programmers at MITRE's modern facilities
in suburban Boston, Massachusetts; Fort Walton Beach, Florida & Montgomery, Alabama.

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To arrange an immediate and confidential interview please forward your
inquiries to Dana N. Burdette, Personnel Director

THE
244

MIT R E

COR P O· RAT I O·N

WOOD STREET -LEXINGTON

73,

MASSACHUSETTS

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COMPUTERS and AUTOMATION for December, 1959

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COMPUTERS
and AUTOMATION
DATA PROCESSING
Volume 8
Number 12

•

CYBERNETICS

•

ROBOTS

DECEMBER, 1959

Established
September 1951

1959 PICTORIAL REPORT ON THE
COMPUTER FIELD

8

FRONT COVER
Seeking Utmost Reliability Under Extreme Conditions
1, 17
- Sylvania's Mobidic
ARTICLE
Maintenance Methods for Digital Computers, FRED
LIGUORI
, 20
READERS' AND EDITOR'S FORUM

6
6

Greetings to Computers
Controversy and "Computers and Automation"
Mathematics Laboratories .
Calendar of Coming Events
Computer Accessory

6
24
24

REFERENCE INFORMATION

26
31
32

Survey of Recent Articles, M. M. BERLIN
Who's Who in the Computer Field (Supplement)
New Patents, R. R. SKOLNICK.
INDEX OF NOTICES
Advertising Index
Back Copies .
see Oct.,
Bulk Subscriptions
see Oct.,
Computer Directory and Buyers' Guide, 1959
see Nov.,
Manuscripts
see August,
Reference and Survey Information . see August,
Who's Who Entry Form .
see August,

page
page
page
page
page
page

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39
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31
28

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COMPUTERS and AUTOMATION is f>ublished monthly at 160 Warren St., Roxbury 19, Mass.,
by Berkeley Enterprises, Inc. Printed in U.S.A.
SUBSCRIPTION RATES: (United States) $5.50 for 1 year, $10.50 for 2 years; (Canada) $6.00
for 1 year, $11.50 for 2 years; (Foreign) $6.50 for 1 year, $12.50 for 2 years.
Address all Editorial and Subscription Mail to Berkeley Enterprises, Inc., 815 Washington St.,
Newtonville 60, Mass.
ENTERED AS SECOND CLASS MATTER at the Post Office at Boston 19, Mass.
POSTMASTER: Please send all Forms 3579 to Berkeley Enterprises, Inc., 160 Warren St.,
Roxbury 19, Mass.
Copyright, 1959, by Berkeley Enterprises, Inc.
CHANGE OF ADDRESS: If your address changes, please send us both your new address and
your old address (as it appears on the magazine address imprint), and allow three weeks for the
change to be made.

4

COMPUTERS and AUTOMATION for December, 1959

AMPEX PRECISION NOW 'LOCKED 'IN"
Lose the precise alignment of tape guiding and driving
components in an instrumentation recorder al1d you lose
the fine edge of designed·in performance. As alignment is
fast. flutter and skew set in.
In the new Ampex FR-IOOB analog recorder, the pos·
sibility of misalignment-even under conditions of shock
and 'vibration incidental to shipment or installation - is
now eliminated by a framework of three precision castings
with machined 'V' mating surfaces that lock all critical
parts into a single rigid unit. The result: an instrumentation recorder with buUt- in performance and reliability that
stays built in.
Other advanced features= 1. A unique electrical holdback system keeps tape tension constant within narrow

'limits, reducing flutter and eliminating mechanical feed~
back of speed variations. 2. Modular plug-in amplifiers
and power supplies give quick versatility for direct. FM
carrier, PDM, and NRZ digital recording. 3. Front,,'panel.
four-speed switching over a six-speed range from 1 'l's to
60 ips allows flexibility in selecting upper frequency limit
for maximum tape economy.
These and other features of the new Ampex FR·IOOB
add up to unmatched performance and refiabiJity. The fun
story is available in the new Ampex FR·I00 brochure.
,AMPEX INSTRUMENTATION.
934 Charter Street. Redwood City. Calif.

Readers' and
Editor's Forum
GREETINGS TO COMPUTERS
FOR CHRISTMAS, WE wish our subscribers, our
readers, and all computer people:
MERRY
X
MAS and a
ATAWWY
EYBSST
S N E'S A S
= NY B MM B W Y,
+SASNARTEYSB

=SANENEWYEAR,
24619 59956 65743 85219 60145 65743 2453000. (Solve
for the digits; each letter stands for just one digit 0 to 9,
although one digit may be represented by more than
one letter.)
This is a Numble, a number puzzle for nimble minds.
For hints for solution if needed, write us. The solution
will appear in January.
We repeat our annual challenge to automatic computers - to solve this kind of problem by an automatic
program. The challenge, offered now for the sixth
December, remains unanswered so far as we know.
CONTROVERSY AND "COMPUTERS AND
AUTOMATION"
I. From: E. J. Teagle
Maracaibo, Venezuela

This is my last subscription unless you cut out that
c - - p about social responsibility and devote more
space to, applications.
II. From: George A. Hall, Jr.
Asst. Editor, ISA Journal
Pittsburgh, Pa.

We here are particularly interested in your continued
support and promotion of the social responsibility of
computer scientists - and by impli~ation automatic control engineers - in the columns of your magazine. This
is fine work: please keep it up.

In the pages of this magazine we shall do our best
to promote controversy, honorable controversy, which
truthfully and honestly expfores ideas, ao.d which tries
to make sure that each side of a questioh is expressed
fairly - without calling names, attacking reputations,
or hugging orthodoxy.
IV. From the Editor:
This is still exactly what· we believe' in - and the
subject of the social responsibility of computer scientists
is worth quantities of discussion and argument.

MATHEMATICS LABORATORIES
I. From: J. F. Clark
21054 Clark Ave., RR3
Langley, British Columbia
Canada

I am teaching mathematics in one of two JuniorSenior High Schools in this district. Our total enrolment in Grades 7 - 13 is approximately 1600. Our
School Board is at present planning to spend about
$30,000 on a music-band room in one school to satisfy
the demands of a Music Specialist .. Full band equipment, music scores, piano, record-player, etc., are already
provided.
As a mathematics specialist I am gre~n with envy.
The total appropriation for mathematics equipment in
the last 10 years would scarcely buy the piano. In order
to rectify this sitaution I am contacting the major
American suppliers of mathematics laboratory equipment. Your address has been obtained from a publication of the National Council of Teachers of Mathematics.
I therefore request your serious consideration in supplying me with catalogues, descriptive literature, and
material which can be of use in approaching the School
Board and selling them on the necessity of mathematics
laboratories.
Our local Board is one of the best an~ I can assure
you they will respond to reasonable demands.
II. From the Editor to Mr. Clark:

III. From the Editor's Notes, Computers and
Automation, April 1954 (Vol. 3, No.4), p. 4 ff:
We believe in the value of controversy, in the field
of computers and automation as well as in all other
fields. A controversial subject is an interesting subject, an important one to argue about and seek the
truth about, through discussion, investigation, and the
clash of different views. It is not necessary to lose one's
temper in discussion, but it is necessary that each party
in the discussion have his fair chance to express his
views, without being called names or having his integrity or loyalty to anyoody or anything attacked.
6

Thank you for your recent letter. We are happy to
enclose our announcements of the things we publish
and our Brainiac kit. Good luck to you in what you
are trying to do, and if we can be of any further help
to you, write us again.
III. From the Editor to the readers of Computers
and Automation:
If you have any information or announcements which
relate to school mathematics laboratories which might
be of interest to Mr. Clark, will you please send them
to him?
COMPUTERS and AUTOMATION for December, 1959

Dramatic improvement over present standard cores offers
greater design flexibility, top performance
in high-speed coincident current memory applications
New l-fL sec memory cores 226Ml (XF-4028)
and 228Ml (XF-4257) developed at RCA's Materials Lab in Needham Heights, Mass., represent an important step forward in ferrite core
design for military and commercial computers.
See chart for the significant improvements in
power requirements and operating margin now
possible in l-fL sec operation.

Call your local RCA Field Representative and
learn how the new 226Ml and 228Ml can fit into
your new computer designs. He can also give
you information on the entire line of RCA Ferrite Memory Cores, Planes and Stacks available
to meet your specific design requirements. For
technical data, write RCA Commercial Engineering, Section L-90-NN, Somerville, N. J.
RCA FIELD OFFICES:

NOMINAL OPERATING CHARACTERISTICS AT 25°C
Response
Full Driving Partial·Write Pulse Rise SWitching
Current (1m) Current (Ipw) Time (T,)
Time (Ts)
{mal
(mal
(llseC)
blsec)

Type

Size

228Ml
(XF-4257)

080" x 050" x .025"

620

310

0.2

226Ml
(XF·4028) .050" x .030" x .015"

380

190

0.2

COMPUTERS and AUTOMATION for December, 1959

"Undisturbed I"
(IlV )
I
(mv)

"Disturbed 0"
(dVz)
(mv)

1

160

18

1

75

10

East:
744 Broad Street, Newark, N. J.
HUmboldt 5·3900
Northeast:
64 "A" Street
Needham Heights 94, Mass.
Hillcrest 4·7200
East Central:
714 New Center Bldg., Detroit 2, Mich.
TRinity 5·5600
Central:
Suite 1154, Merchandise Mart Plaza
Chicago, III., WHitehall 4·2900
West:
6355 E. Washington Blvd.
los Angeles, Calif., RAymond 3·8361
Gov't:
224 N. Wilkinson St., Dayton, Ohio
BAldwin 6·2366
1625 ··K" Street, N.W.
Walhington, D.C., District 7·1260

7

1959 Pictorial Report on the
Computer Field
This is a pictorial repo n for 1959 on the computer
fiel{ including computers, data processors, components,
etc. To pu.t tog ether this report, we sent out a letter
to many organizations in the com purer field , asking for :
"interesting, striking, and dramatic pictures related to
the computer field in 1959 - pictures that answer
ques tions' :
What does a . . . . . look like?
Wh at goes into a . . . . .
How is a . . . . . made?
How does a . . . . . operate ?
and simi lar questions ."
We sa id we wanted to avoid pictures that showed only
"smooth and featu reless ourside cove rings. "

A number of good pictures h ave bee n sent to us, and
we are grateful for th em. Many of these have been
pri nted as a p art of this report, which includes the
fro nt cover also; but there is not room for all of th em
to be publi shed in this issue, and so we shall p lan to
publish more of them in later issues.
.
Th e present repo rt is a continuation of our previous
p ictorial reports : " A Pictorial Manua l on Computers,"
fi rs t pri nted in two parts, one in D ecember 1957, the
other in January 1958, subsequently reprinted as a
special issue of Computers and Automation, vol. 6, no .
12B; and " 195 8 Pictorial Repon on the Compurer
Field ," printed in the December 1958 issue of Computers and Automation, vo l. 7, no . 12.

I. Computers

This is an automatic digital computer being used for control purposes in a cement-munng company. It directs the
blending and storage of raw materials, and will evenrually exercise closed-loop control over the kilns. The machine
is an RW 300 made by Thompson-Ramo-Wooldridge Products Co., Beverly Hills, Calif., and is in use at the Riverside Cement, Co., Oro Grande, Calif. (Figure 1)
COMPUTERS and AUTOMATION for D ecember, 1959

One of the lowestpriced (under $20,000)
complete automatic
digital computers is
the DE 60 of Clary
Corporation, San Gabriel, Calif. (Figure
2). Part of the programming is accomplished by a plugboard,
and more by sequential instructions from
the keyboard. The
arithmetic unit (Figure 3) is contained in
the box under the type·
writer, and is shown
opened in Figure 3.
N o tubes are used in
the logical operations
of the computer; the
thyrarrons are power
tubes.

COMPUTERS and AUTOMATION for December, 1959

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This is a general purpose analog computer ~...._
constructed by and in
use at Boeing Airpl a ne Co . , Seattl e,
Wash., for so l ving
heat-transfer problems
in the design of mann e d s upersonic aircraft. It is about 1/ 8
the size and 1/ 10 the
cost of comparable
models. It is assembled from 11 kinds of
standard boxed units,
which are connected
from in front. In a
steady-state heat-transfer problem, where
skin temperatures are
assumed to be constant,
in te r i or temperatures
can be found simultaneollsly at 400 different locations. The
computer h as been
named R eastan. (Figure 4 )

This is a new generalpurpose analog computer with 30 amplifiers and 35 to 55 potentiometers, desk size,
expandable, able to
solve linear and nonlinear differential equations, etc. The machine is the Model 3100
analog computer made
by Donner Scientific
Co., Conc o rd, Calif.
(Figure 5)
10

COMPUTERS and AUTOMAT ION for D ecember, 1959

This shows the console of the
central computing unit of the
very large-scale and powerful
computer, the Transac S 2000
made by Philco Corp. , Philadelphia, Pa. The plug-in circuit
boards appear through the glass
windows of the front of the console. (Figure 6)

This machine is sorting checks at the rate of 25 a second, by means
of magnetic ink characters printed or entered on each check. T he
characters record account number, amount, and other information.
The sorter is an element of the Burroughs B 251 Visible Record
Computer made by Burroughs Corp., Detroit, Mich. (Figure 7)

Here is shown a band of Mylar plastic tape containing about 200 instructions for the operation
of the Burroughs B 251 Visible Record Computer.
Up to 12 tape readers may be installed, so that
the computer may refer to more than 2500 programming instructions. Also shown is one of the
small transistorized printed circuit boards. (Figure 8)
COMPUTERS and AUTOMATION for December, 1959

11

..
y

Here is a small general-purpose digital computer, with: electric typewriter input and output; paper tape reader and
punch; and at the right, the main computing unit (Figure 9). This is the Recomp II made by Autonetics division
of North American Aviation, Downey, Calif. Below is the computer unit opened up. (Figure 10).

12

COMPUTERS alld AUTOMATION for December, 1959

Here is part of the magnetic drum memory of the Recomp II being assembled and wired. The capacity of the memo
ory is 4096 words of 40 binary digits each. (Figure 11)

The purpose of this machine is to convert information from magnetic tape to
paper tape. It is made by
Telemeter Magnetics, Los
Angeles, Calif., and contains
among other components a
magnetic tape reader made
by Ampex Instrumentation,
Redwood, City, Calif. (Fig.
ure 12)

COMPUTERS aud AUTOMATION for December, 1959

13

2. Input

This is an automatic electronic reader of typewritten or printed characters in correspondents' addresses on ordinary
mailed envelopes. The model is being developed further, under a contract with the U.S. Post Office Department,
by Intelligent Machines Research Corp., a subsidiary of Farrington Manufacturing Co., Needham Heights, Mass.
(Figure 13)

Pictorial information can be converted into digital data for computer input. The machine shown takes
stereophotographs and with the aid of an operator converts highway cross·section measurements into digital form punched on punch cards or punch tape. The machine is the Terrain Data Translator made by
the Benson Lehner Corp., Los Angeles 64, Calif. (Figure 14)
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COMPUTERS a/lei AUTOMATION for December, 1959

3. Output

Here is a tape punch
which punches 120
characters per second.
It is part of FLAC, the
Florida A ut omatic
Computer. This machine was designed and
is operated by the RCA
Service Co., Missile
Test Project, Patrick
Air Force Base, Florida. (Figure 15)

The machine shown above puts out digital and other symbolic displays (eight numbers or symbols printed in parallel) at speeds of up to one display per second. The machine also draws lines. In fact, it can draw any picture
consisting of a series of straight lines; for the mapmaker it draws maps ; for the highway engineer it draws terrain cross sections and profiles; for the petroleum geophysicist it prints subsurface contours; and for the petroleum
production man it presents oil well production information. This machine is the Electroplotter Model S made by
Benson Lehner Corp., Los Angeles 64, Calif. (Figure 16)
COMPUTERS and AUTOMATION for D ecember, 1959

15

This is a high-speed paper-tapeimprinting output device. While
the paper tape runs continuously,
the typewheels make up to 30
revolutions a second, each wheel
bearing 64 characters. Hammers
actuated by precisely timed solenoids strike the pressure-sensitive
paper, and character face in 50
miIlionths of a second, so there
is no smearing of the impression.
Another model can type up to 190
characters per line at rates up to
15 lines per second. The machine
is made by Shepard Laboratories,
Summit, N .J. (Figure 17)

4. Components

This is a magnetostnCtlOn delay line, a memory which stores information based on the change of physical
dimensions of a material when it is magnetized as compared with when it is not magnetized. The manufacturer is Ferranti Electric Co., Hempstead, N.Y. (Figure 18)
16

COMPUTERS and AUTOMATION for December, 1959

The utmost reliability under very rigorous conditions has been sought in the components of the mobile digital
computer, Mobidic (Figures 19 and 20, and the Front Cover). It is being built by Sylvania Electronic Systems,
Needham, Mass. for the U.S. Armed Forces. The components have been constructed in three levels of packaging:
(1) small printed circuit plaques with components mounted and soldered; (2) larger printed circuit boards with
the plaques mounted upon them; and (3) frames in which the larger boards may slide in and out. For other purposes than Mobidic, the frames also have been made removable and insertable. (See Front Cover)

lEST B~OCK f

IN SERTION AND
RE LEASE Bun ON
2 INDICATOR LAMPS
(MAX.)

COMPUTERS alld AUTOMATION for December, 1959

ELCO C6NT ACT

CARD FRAME~-.

17

Above the magnetic oxide coating for a magnetic drum is being inspected for concentnclty with a
micro-probe amplifier. The concentricity tolerance on this particular drum was 70 millionths of an inch.
The manufacturer is Bryant Computer Products Division, Springfield, Vermont. (Figure 21). Below
holes are being machined into the drum housing in order to fasten the magnetic read/ record heads.
(Figure 22)

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COMPUTERS and AUTOMATION for December, 1959

This picture high-lights a current computer application to a U.S. Army war-game problem. The
game (called SYNTAC) is used to evaluate the feasibility of operational and organizational concepts; it is played manually by two opposing teams maneuvering on a map. The teams are members of the Combat Research Operations Group (CORG) of Technical Operations Inc., Burlington,
Mass., associated with Combat Development System, U.S. Continental Army Command, Fort Monroe, Va. The umpire is a Control Group assisted by an LGP-30 computer, made by Royal McBee
Corp., Port Chester, N.Y.; the computer is essential for quickly and accurately judging the moves.
(Figure 23)

Checking and maintaining the operation of computers is perhaps the most
fundamental of all computer requirements. This
picture shows a technician checking a logic
chassis in the RCA-SOl
electronic data processing
system, in the RCA plant,
Camden, N.J. The most
recently delivered RCA
501 was installed in Denver in October for supervision and control over
records of air reservists.
(Figure 24)

COMPUTERS and AUTOMATION for December, 1959

19

MAINTENANCE METHODS FOR
DIGITAL COMPUTERS
Fred Liguori
Sperry Gyroscope Co., Marine Div.
Syosset, L.I., N.Y.

Supplying an adequate maintenance manual concurrently with or shortly after the delivery of an elaborate
equipment is never a simple task. The problem of anticipating actual operating conditions and the reliability
of the equipment has no simple solution. In the case of
digital computers, however, two additional factors further
complicate the problem:
( 1) Almost unlimited flexibility of operation based on
an easily changed, stored program makes the computer's
ultimate use unpredictable.
(2) The dependence of computer operation on stored
data requires tests other than the usual tests on physical
hardware.
The usual solution to the checkout and maintenance
problem is to utilize the computer itself to isolate or at
least localize the trouble area. This requires a well developed test program that checks memory data as well as
the system electronics. The use of test programs, however,
present problems of their own.
The main purpose of this article is to consider various
methods of attacking the maintenance problem and to
discuss the merits and disadvantages of the methods considered.
Maintenance based on Permanently Stored
Test Programs
The desirable features of a well designed test procedure
based on programs permanently stored in the computer
memory are:
( 1) Thoroughness of checkout
( 2) Minimum of time required
( 3) Minimum possibility of human error
( 4) Actual operating conditions can be simulated
(5) Minimum knowledge required by technician
(6) Minimum of test devices and maintenance literature required
Items (1) and ( 2) are closely interrelated since it is
the rapid action of programmed tests that enables all circuitry and each memory cell to be checked Out within a
reasonable time. For the average computer the time required for such tests is about fifteen minutes if no faults
are encountered. A similar test by manual procedures
would require hours or even days for larger computers.
Human error is obviously minimized by semi-automatic
testing that requires only the use of a selector switch and
actuating button.
The inherent computational speed of the computer
enables the system to be checked out while operating at
20

normal speed. Thus the programmed test gives the truest
indication of operability. Such a test would be impossible
by means other than automatic.
Programmed tests can be performed by the operator
since a minimum knowledge of computer theory is required. The results obtained are compared to predicted results to determine faulty areas. Such tests serve as an
excellent checkout procedure before putting the computer
"on line."
A minimum of technical literature is required to explain the operation of tests because of their simplicity.
1£ the computer is well-designed, no auxiliary test devices
are required for the first stage of checkout and troubleshooting. For detailed trouble isolation, a minimum of
equipment is required. Usually a fast-sweep oscilloscope
and a vacuum tube volt meter are sufficient. '
With these powerful advantages, it is difficult to belittle the stored program troubleshooting approach. Yet
there are a few items that must be considered since it may
be impossible to depend on stored program troubleshooting.
( 1) There may be failures in the test program.
(2) Space may not be available for storing the required test programs.
( 3) Reliance on test programs hinders the development of the maintenance man.
There is always the possibility that the test program
itself will fail. Such a failure can be due to a damaged
portion of the memory or to an electronic failure in the
computer hardware. A well-designed memory is almost
indestructible in normal operation, or at least its life expectancy can be fairly well determined beforehand. False
failures can be eliminated by accepted verification routines. An electronic failure hindering the test program will
in all probability result in an operational failure as well.
Thus such a failure is the very reason for which the test
program exists. By analyzing the point of failure, a good
insight to the difficulty is obtained. Here, however, the
burden is placed on the test program designer to avoid
false indications when displaying test program results.
The space problem in programmed testing is of no concern where an adequate storage facility is incorporated
in the computer memory. But it is important enough to
be prohibitive where storage space is not available. The
solution to this problem is not nearly so simple as "providing an adequate storage" may sound. The problem of
anticipating the storage space required for operational
programs is one of the most difficult problems in computer
design. The cost of the memory unit is too great to employ a large safety factor in estimating its storage requireCOMPUTERS and AUTOMATION for December, 1959

· The new Ramo-Wooldridge Laboratories in Canoga
Park, California, will provide an excellent environment
for scientists and engineers engaged in technological
research and development. Because of the high degree
of scientific and engineering effort involved in RamoWooldridge programs, technically trained people are
assigned a more dominant role in the management of
the organization than is customary.
The ninety-acre landscaped site, with modem buildings grouped around a central mall, contributes to the

academic environment necessary for creative work. The
new Laboratories will be the West Coast headquarters
of Thompson Ramo Wooldridge Inc. as well as house
the Ramo-Wooldridge division of TRW.
The Ramo-Wooldridge Laboratories are engaged in
the broad fields of electronic systems technology, computers, and data processing. Outstanding opportunities
exist for scientists and engineers.
For specific information on current openings write
to Mr. D. L. Pyke.

il
U THE RAMO·WOOLDRIDGE LABORATORIES
8433 FALLBROOK AVENUE. CANOGA PARK. CALIFORNIA

COMPUTERS and AUTOMATION for December, 1959

21

ments. Modular design of storage is possible so space could
be added after the completed design. This, however, still
requires some costly provisioning in the original design
that may never be utilized. Also, most modular memory
units with a reasonable capacity are not fast-access memories; therefore they would slow down the testing operation. Thus after painstaking design of a suitable test
routine, it may not fit into the computer together with the
operational program without a costly compromise of one
or both programs.
Finally, the maintenance man must be considered. If,
as is the case with armed forces installations, there is a
rapid turnover of personnel, simple test procedures are a
must. But undue reliance on simplified routines gives the
maintenance man little occasion to become really familiar
with computer theory. He is subsequently hampered in
dealing with problems not isolated by the routines. This
is a more severe problem in experimental or constantly
changing computer applications where analytical ability
is required of the maintenance man in addition to general
experience and know-how.
Maintenance based on Programs in Temporary Storage
Besides the permanent storage space, computers also
have temporary storage space in varying proportions to
permanent storage. The storage is temporary in that this
space is required for intermediate or "scratch-pad" computations during normal computer operation. Thus its
contents are automatically destroyed, by re-writing in
these cells under the direction of the program.
The advantages of utilizing temporary storage space
for test programs are as follows:

SCAN YOUR FUTURE IN THE

~OMPUTER

FIELD

The design of a new static state digital computer
has created several openings in real-time control of
industrial processes especially in the power, petroleum
and chemical fields. The computer is used as a direct
tool for process control as well as scienHfic computing.

LOGICAL DESIGNER
Work with customer requirements and translate them
into circuit design to meet varied application problems. Computer design experience preferred or related experience such as transistor and switching circuits, high gain linear amplifiers and selection matrices.

PROGRAMMER
Experienced in time shared programming techniques.
Analytical experience on scientific problems required.
Emphasis on coding techniques, system programming,
real time simulation, information storage and retrieval.
The growth of our organization and the success of
our computer endeavors has created these openings.
For a confidential interview or for more particulars
forward a complete resume to Mr. W. A. Wecker,
Personnel Director,

INFORMATION SYSTEMS, INC.
7350 N. Ridgeway
Skokie, Illinois

22

( 1) The use of valuable permanent storage space required is minimized, or unnecessary.
( 2) Substantially all advantages of permanent storage
test routines can be realized.
Item (1) is an advantage only if the temporary storage
is adequate for test programs or if sufficient additional
space is available in permanent storage. For a thorough
checkout procedure, however, temporary storage facilities
are usually inadequate.
Utilizing temporary storage space reduces the speed of
testing inherent in permanently stored test programs because the routine must be loaded into memory before each
use.
Where temporary storage space is inadequate, it is possible to use permanent storage space in the same manner as
temporary storage, but this is further complicated by the
need to re-Ioad the operational program when the test
program operation is completed. Such an operation allows
some human error into the picture, but this can be minimized as follows:
( a) Have the temporary program automatically stop
itself when the test program is fully loaded.
(b) Have the same input device (tape, etc.) also contain that portion of the operational program to be restored.
( c) Make part of the procedure for the test, a ' simple
switch action that continues the loading operation through
the operating data reload cycle upon completion of the
test operation.
Verification of the re-loaded program is still a must, but
there are well established techniques for that.
The disadvantages of relying on temporary test programs are:
(1) Items (1) and (3) of those discussed for permanently stored tests.
'
(2) Speed of operation is greatly reduced by the need
for loading and possibly reloading and verification.
(3) There is at least a partial increase in potential human error.
Maintenance based on Manual Testing Procedures
Even with the best programmed test procedures, there
comes a time when the final analysis of the trouble depends on conventional troubleshooting techniques with
auxiliary test devices. If the computer has a well-designed
test program, however, this is only the last step in the repair procedure. The computer will normally have been
put back into operation by replacing a modular unit before detailed testing of circuits begins. The modular unit
itself is tested by the auxiliary devices without the pressure of having to get the computer back "on line."
There are certain advantages to a complete manual
troubleshooting technique despite its $eemingly oldfashioned approach. Most of these advantages, however,
diminish in relative importance as the computing system
increases in size and complexity. Among the paramount
advantages are:
( 1) There is little or no need for storage space.
( 2) There is no drain on programming time in setting
up procedures.
( 3) The testing approach is more independent of the
computer itself.
( 4) The technician must learn more of the system.
( 5) With intelligent modular design this may be at
least as fast as using temporary storage programs.
COMPUTERS and AUTOMATION for December, 1959

Explorer VI
...

isa

I

--

...

-----

-- ...
.... ....

;';' , "space laboratory
,, '" '"
orbiting

I

- -- ---

....

,

.... ....

....

"",
\.

\
\

,

around

I

\
\

\

i
I

,,

I

the
""

I

/

'-"', , earth
.... ....

....

with
paddles

--- ---

capturing
sunlight
for
power
The scientific data that will some day enable
us to probe successfully to the very fringes of
the universe is being recorded and transmitted
at this moment by the space laboratory
Explorer VI, a satellite now in orbit around
the earth. This project, carried out by Space
Technology Laboratories for the National
Aeronautics and Space Administration under
the direction of the Air Force Ballistic Missile
Division, will advance man's knowledge of:
The earth and the solar system . .. The magnetic
field strengths in space . .. The cosmic ray
intensities away from earth . .. and,
The micrometeorite density encountered in
inter-planetary travel • Explorer VI is the

most sensitive and unique achievement ever
launched into space. The 29" payload,
STL designed and instrumented by STL in
cooperation with the universities, will remain
"vocal" for its anticipated one year life.

Space Technology
COMPUTERS and AUTOMATION for December, 1959

How? Because Explorer VI's 132 pounds of
electronic components are powered by storage
batteries kept charged by the impingement
of solar radiation on 8,000 cells in the four
sails or paddles equivalent to 12.2 square feet
in area • Many more of the scientific and
technological miracles of Explorer VI will be
reported to the world as it continues its epic
flight. The STL technical staff brings to this
space research the same talents which have
provided systems engineering and over-all
direction since 1954 to the Air Force Missile
Programs including Atlas, Thor, Titan,
Minuteman, and the Pioneer I space probe.
Important staff positions in connection with
these activities are now available for
scientists and engineers with outstanding
capabilities in propulsion, electronics,
thermodynamics, aerodynamics, structures,
astrophysics, computer technology, and
other related fields and disciplines.
Inquiries
and resumes
are
invited.
P. O. Box 95004
Los Angeles 45, California

Laboratories, Inc.

23

Since many computer routines require the use of storage
a valid test must also utilize storage space. The temporary
storage is adequate for such simple storage problems, however. All instructions in this approach are entered manually so the often lengthy loading operation is not required.
An important advantage in the early stages of computer
development is the independence of this technique. The
programming time is often preoccupied with evaluation

CALENDAR OF COMING EVENTS
Dee. 1-2, 1959: 4th Midwest Symposium on Circuit
Theory, Marquette Univ., Milwaukee, Wisc.
Dec. 1-3, 1959: Eastern Joint Computer Conference,
Statler Hotel, Boston, Mass.
Dee. 7-9, 1959: Cooperating Users Exchange (CUE)
'Meeting, (users of Burroughs 220), Statler Hotel, St.
Louis, Mo.
Feb. 25-26, 1960: Univac Users Association Semi-Annual Meeting, Greenbrier Hotel, White Sulphur
Springs, W. Va.
March 21-24, 1960: IRE National Convention, Coliseum and Waldorf Astoria Hotel, New York, N.Y.
April 18-19, 1960: Third Annual Conference on Automatic Techniques, Cleveland-Sheraton Hotel, Cleveland, Ohio.
May 2-6, 1960: Western Joint Computer Conference,
San Francisco, Calif.
August 23-25, 1960: Annual Meeting of the Association for Computing Machinery, Marquette Univ.,
Milwaukee, Wise.

COMPUTER
PROGRAMMERS·ANAL YSTS
Broadview Research Corporation is seeking computer
programmers and applications analysts to work in the
areas of scientific calculations, systems programming, and
commercial data processing.
Company experience includes: satellite orbit computations, numerical solution of differential equations, simulation of communication systems, application of data
processing techniques in the areas of logistics, personnel,
and administration.

and operational programs so that a period might exist
where no test programs are available even if it is intended
to develop them.
In programmed tests there is always some dependence
on basic computer operations which may not be available
due to the malfunction that exists. The failure indication
when the test program cannot be completed cannot always
be anticipated by the procedure. This complication is
avoided in a manual testing procedure.
Advantage (4) might sound like a disadvantage but
there is merit to making the technician work at troubleshooting. In difficult troubles where programmed tests fail,
the technician's reservoir of experience and familiarity with
theory are valuable assets. These assets are acquired only
through working with the circuitry.
The speed with which the computer is returned to
operation is of utmost importance in large scale computers
where operating time is in hundreds of dollars per hour.
There, this serious disadvantage to manual techniques exists. Indeed it is often prohibitive. Yet with modular design in vogue, large sections of the computer can be replaced by simply exchanging pluggable packages without
even shutting off power. A good technician need not
make too many calculated guesses to replace the faulty circuit. Then the testers do the rest when the computer has
been returned to operation. A good maintenance manual
is a valuable aid in this "mental" troubleshooting process.
Troubleshooting charts of the "yes - no" variety that are
well thought out can do a lot of the thinking and eliminate
much of the pressure when first attempting the repair.
The major disadvantages of the completely manual approach to testing are:
(1) The enormity of the system may make it virtually
impossible to use this method exclusively.
(2) Where useable, the method will almost always be
slower.
(3) It requires a high-calibre technician and close
familiarity with the system.
( 4) It requires a better-than-average maintenance manual.
( 5) The storage system must be almost infallible if it
is very large, since manual checking of stored data
is impractical.

COMPUTER ACCESSORY

Qua1i'fications: programming experience with mediumlarge scale computer systems.
Openings exist at Burlingame, California, Alamogordo,
New Mexico, and Fort Huachuca, Arizona.

Contact: Mr. William J. Petersen

Broadview Research Corporation
1811 Trousdale Drive

Burlingame, California
"Really, H;nshaw, I don't feel that's necessary!"

24

COMPUTERS and AUTOMATION for December, 1959

r-------------------------------,

Still using "old-fashioned"
methods for measuring non-recurring

new
improved
n

transients? If so, now is the time to
investigate the easy way to solve your
most difficult transient measurement
problems with the latest model Hughes
"Memo-Scope" oscilloscope.
Why? Because new features, new

Memo.Scope~'

advanced circuitry, new panel layout
and new mechanical design now
assure maximum accuracy in all your
transient measurements-plus higher

ill cope

performance, greater dependability
and easier operation I

1-------------------------------The Hughes "Memo-Scope" oscilloscope
(Model 104E) stores nonrepetitive events
for an indefinite period-hours, or dayskeeping them available for thorough study
until intentionally erased.
- - - - - - - - - - - - - - - - - - - - - - - - - - - -I
I
I

new improved features
• Simplified panel layout: redesigned
trigger circuit ... assure easier
operation,
• Advanced mechanical design gives:
• Better cooling for longer
component life,
• Far greater accessibility for
maintenance,
• Increased ruggedness; resistance
to vibration,
• Built-in single-sweep circuit ("1-shot"
trigger) at no extra cost,
• Available for either 110 v. or 220 v.
operation.

applications
•
•
•
•
•

Data reduction equipment troubleshooting
Physical testing: shock, stress, strain
Ultrasonic flaw detection
Semiconductor testing
Ballistics and explosives research
... and many others.

I
1- - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - --I

I
I
I

INDUSTRIAL SYSTEMS DIVISION

j- - - - - - - - - - - - - - - - - - - - - - - - - - .. - - For complete information on the new improved Hughes"Memo-Scope"
oscilloscope (ModeI104E), detailed data sheets and application analysis
of your transient measurement problems, write or wire: HUGHES PRODUCTS
Industrial Systems Division, International Airport Station, Los Angeles 45, California

I

--I
I
I

I

_______________________________ J

HUGHES PRODUCTS
~

I
I

@1959, HUGHES AIRCRAFT COMPANY

SEMICONDUCTOR DEVICES' STORAGE TUBES AND DEVICES. MICROWAVE TUBES' VACUUM TUBES AND COMPONENTS· CRYSTAL FILTERS· MEMO·SCOPE@OSCILLOSCOPES· INDUSTRIAL CONTROL SYSTEM'>

COMPUTERS and AUTOMATION for December, 1959

25

SURVEY OF RECENT ARTICLES
Moses M. Berlin
Cambridge, Mass.

We publish here a survey of articles related to computers and data
processors, and their applications and
implications, occurring in certain
magazines. We seek to cover at least
the following magazines:
Automatic Control
Automation
Automation and Automatic
Equipment News (British)
Business Week
Control Engineering
Datamation
Electronic Design
Electronics
Harvard Business Review
Industrial Research
Instruments and Control
Systems
ISA Journal
Proceedings of the IRE
Management Science

ill

SOUTH BEND

•

needs immediately

ANALOG COMPUTER
ENGINEER
B S Mechanical Engineer, Aero Engineer, Physics M S preferred. At
least three years of experience in
the use of analog computers for
studying dynamic problems. Applications are in the field of aircraft and
missile propulsion control systems, dynamics of landing gear systems, hydraulic and pneumatic devices and
heat transfer.
The computer facilities include a
repetitive analog, a precision real
time analog and digital computers.
Salary commensurate with experience. Comprehensive benefit program
is offered including; moving and
transportation allowances, group insurance, vacations, and tuition assistance for advanced degrees at the
University of Notre Dame.
Call or write immediately to:
John M. Evans
Administra tive Engineering
Bendix Products Division
401 North Bendix Drive
South Bend, Indiana

26

The Office
Scientific American
The purpose of this type of reference information is to help anybody
interested in computers find articles
of particular relation to this field in
these magazines.
For each article, we shall publish:
the title of the article / the name of
the author(s) / the magazine and
issue where it appears / the publisher's name and address / two or
three sentences telling what the
article is about.
Building-Block Circuits for Transistorized I?igital Computers / C. J. Creveling and others, (Staff Group of the
Electronics Div.), U.S. Naval Res. Lab.,
Washington, D.C. / Electronic Design,
vol. 7, no. 18, Sept. 2, 1959, P 18 /
Hayden Pub. Co., Inc., 830 Third Ave.,
New York 22, N.Y.
This article offers an aid to the computer design engineer, by presenting several
key building-block circuits. The circuits
were originally designed for a unit computing at a 500 kc rate with logic performed in one micro-second wide synchronized pulse positions; but it can
serve as a guide for the design of other
computer systems .
Data Storage and Display with Polarized
Phosphors / H. P. Kallman and J. Rennert, Physics Dept., Institute of Mathematical Sciences, New York University,
New York / Electronics, vol. 32, no.
35, Aug. 28, 1959, P 39 / McGraw-Hill
Pub. Co., Inc., 330 West 42 St., New
York 36, N.Y.
Used in computers as well as photography, a system known as "persistent
internal polarization" stores data on a
phosphor. The process produces a separation of charges with doc fields and radiation, and provides longer storage life in
the memory of the computer.
Automatic Programming in the Soviet
Union / A. P. Ershov, Chief, Theoretical Programming Dept., Computing
Center, Academy of Sciences of the
USSR; as related to E. J. Guerin, European Editor, Datamation / Datamation,
vol. 5, no. 4, July-August, 1959, P 14
/ Datamation, 10373 W. Pico Blvd., Los
Angeles 64, Calif.
This article describes early coding methods developed in Russia and applied to
Soviet computers. Various schemes are
given, and arithmetic, logical readdressing,
restoring and double-counting operators
are included.

Analog-Digital Converters, Part III /
Electromechanical Design, vol. 3, no. 8,
Aug., 1959, pp 27-33 / BenwiIl Publishing Corp., 1357 Washington St.,
West Newton 65, Mass.
The performance characteristics of the
converters are described. Tables are given, which list the commercially available
types; however, as is stated at the outset,
the scope of the report is limited strictly
to converters, excluding digital voltmeters which constitute a particular class of
converter with visual read-out.
Progress in Computers and Office Automation / V. J. Ford, Regional Mgr.,
Electrodata Div., Burroughs Corp., Detroit / Journal of Machine Accounting,
vol. 10, no. 8, Aug., 1959, P 14 / National Machine Accountants Assn., 720
Kensington Rd., Arlington Heights, Ill.
From the Eniac to today's massive,
high-speed computers, great strides have
been made in twelve years of automatic
data processing. This article reports on

product
development
An unusual opportunity for a
man with a B.S. degree in Physics
or Electrical Engineering plus
practical experience in the business
machine industry. An advanced
degree in business administration
or industrial management is
especially desirable.
Assignments will include
determination of research
requirements and the evaluation of
research programs in areas
associated with our present and
future products, encompassing
business machines, systems, and
EDP applications. Summation and
critical evaluations of findings are
to be made for research
management.
For further information on this
excellent opening, contact
Technical Placement, Section D-5.

The National Cash
Register Company
Dayton 9, Ohio

COMPUTERS and AUTOMATION for December, 1959

Radar Tracking Computers

MC·5900 Process Master
Analog Computer

MC·3302
TranSistorIZed
Data Plotting
Board

MC·5800 Precision
Master Analog Computer

MC·70t
Electronic
Multiplier

Linear Programming Computer

Some people can prove man and mouse are identical
It's all according to the points of similarity you choose. Differences
are what really prove the superiority of man over mouse. Computers
have differences, too. In fact, it's in these diiIercnccs that the CSIdesigned MC-S80J obsoletes every other Analog Computer. The best
proof lies in
cold
hard
Specifications
• Exclu!>ive dynamic memory makes automatic iterative solution of
statistical or optimization problems a reality.
• Stable amplifier operation over the entire feed-back range from
zero to infinity.
• Lowest amplifier grid-current <10-[) ampere.
• Amplifiers provide lowest noise level output-less than one millivolt at unity gain.
• Amplifier frequency response-flat to 10,000 cps and only 3 db
down at 28 kc.
g Real-time precision @ speeds to 60 solutions/sec.
• Exclusive electronic generators of the function of two-or-more
variables may be programmed at patch-board in same time required
for setup of single-variable generators.
• Will program 134 amplifiers, 30 electronic multipliers, 18 diode
function generators, 2 time-delay generators, 8 relay amplifiers, and
6 servos from one 2128-hole patchboard.
• Highest performance electronic multiplier-flat to 10,000 cps and
only 3 db down at 20 kc.
• Dynamic memory
high-speed quick-reset rep-op provide practi.
cal approach to solution of simultaneous partial differential equations.
• Dynamic memory with time-base accuracy of ± 10 }.tsec provides
automatic parameter searching by iteration-an exclusive capability.
• Solution of problems with up to 15 amplifiers in closed loops.
• Plug-in dynamic components ease maintenance.
• Lowest computer cross-talk-rejection greater than 2,000 to l.
• Selection of real-time, expanded-time or high-speed compressedtime without reprogramming.
• Passive networks stabilized at < laC above room ambient - no
oven required.

~

•

rl\l '5 '""
X- ~ OlTSc
1'1\.

+

• EVERY SPECIFICATION IS GUARANTEED TO BE TRUE PEHFOR:\lANCE
STANDARD-IN SUSTAINED OPERATION.

• Only diode function generators utilizing resistors, potentiometers,
and diodes of equal quality to those in computing networks.
• Only diode function generators with individual hi-Io gain po!>itions
for each segment.
• Lowest function generator drift < 5 mv/8 hrs.
• Lowest servo step-function overshoot-less than 1%.
• DC tachometcr feedback on all servos.
• Complete control of all amplifiers, multipliers, dividers, and nonlinear equipment at patchboard.
.......,
• Exclusive equipment-door packaging for free access an:! quick
maintenance without shutdown.
Ell Insulated patchboard prevents costly shorting accidents.
• Power supplies eliminated from console-lowest, most stable
operating temperatures-rise < 3°C.
• Field expandable without mechanical rework or rewiring.

--'

There are many more differences (over a hundred, in fact). Before
you buy or lease your next analog computer, compare them all ..•
and we think you'll agree with us when we say: The MC-5800 obso·
letes every other analog computer made.
Computer Systems, Inc.-designers and manufacturers of the high.
e8t precision analog computers and computer accessories.

~

COMPUTER SYSTEMS, INC.,

611 BROADWAY, NEW YORK 12.. N. V •• SP 7-4018

A Schlumberger Subsidiary

COMPUTERS and AUTOMATION for December, 1959

•

formerly Mid-Century Instrumatic Corp.

27

progress in the industry and reveals some
interesting applications of computers.
The Use of Univac in Processing and
Analyzing Origin-Destination Data for
the Washington, D.C., Metropolitan
Area / Dr. E. E. Blanche, Chief Res.
Scientist, E. E. Blanche & Associates,
Inc. / Journal of Machine Accounting.
vol. 10, no. 8, Aug., 195/, P 26 /
NMAA, 720 Kensington Rd., Arlington Hts., Ill.
The use of high-speed computers hav(;'
made possible the design of systems which
save time and accurately process origindestination data. The article describes the
operation of the system, giving examples
of actual data processed by computer.
Showcase Your Computer! / E. Whitmore / Management and Business Automation, vol. 2, no. 1, July, 1959,
P 18 / The Office Appliance Co., 600
W. Jackson Blvd., Chicago 6, Ill.
This article questions the wisdom of
executives who seem to "soft-pedal" their
company's use of automation, and points
to a large stock advising firm, which attempts to publicize their computer installation, and informs their customers
and employees of the benefits to be derived from electronic data processing.

RCA ... world leader in electronics ... is currently
expanding its electronic data processing operations
as a result of one of the most significant breakthroughs
in modern electronics-the all-transistor RCA 501
system. Already the RCA 501 is being talked about
as the world's most efficient electronic data processing
system; its sales curve is slanting sharply upwards.

Machine Translation of Russian / C. H.
Johnson, Editor, Journal of Machine
Accounting / Journal of Machine Accounting, vol. 10, no. 8, Aug., 1959,
P 100 / NMAA, 720 Kensington Rd.,
Arlington Hts., Ill.
The National Bureau of Standards has
been studying the problem of translating
languages by computer. This article describes a process which resulted from
experiments in translation. The process
goes beyond word-to-word translation,
taking into account grammatical, syntactical and lexicological properties of the
words.

If you have experience in EDP sales or technical
services, and are ready to step up to more challenging
and rewarding assignments, investigate today the
many new career openings at RCA. Current positions,
dealing with medium and large-scale systems, include the following:
EDP SALES REPRESENT ATIVE- background should
include a thorough systems knowledge and at least
one year of field experience with either government
or commercial clients.

English Abstracts of Russian Technical
Journals / Publications, and Public Information Div., Office of Technical
Services, U.S. Dept. of Commerce,
Washington 25, D.C. / 1959, printed,
(5" by 8" card form on card stock),
cost: see below
A listing of the numerous abstracts
available, has been issued by the OTS.
Listed according to subject - aeronautics,
astronomy and mathematics, chemistry
and chemical engineering, civil engineering, electrical engineering, fuel and
power, geography and geology, mechanical engineering, mining and metallurgy,
physics, science and technology-generalsingle issue pw cs and subscription rates
are given.

EDP PROGRAMMERS AND METHODS ANAL YSTS-

local openings for qualified men to work closely with
both customer and sales personnel in the development of specific applications, related procedures,
and programs.

For a strictly confidential interview with RCA management, please send a detailed n3sU'me of your background and personal qualifications to:

(e.
~®

28

Mr. E. C. Baggett
Professional & Administrative Employment
RCA, Dept. l-8L
Bldg. 10-1
Camden 2, N. J.

RADIO CORPORATION

0'

AMERICA

ELECTRONIC DATA PROCESSING DIVISION

Governor's Island File Computer / L.
Feidt / Computing News, vol. 7, no.
16, Aug. 15, 1959, pp 155-3 / Computing News, P.O. Box 90424, Airport
Station, Los Angeles 45, Calif.
Statistical and qualification data on
more than 60,000 people in the active
First Army are processed by a computer
located at the New York Army base. This

COMPUTERS and AUTOMATION for December, 1959

18 K
~I.W

•

3301'P

IK

I

I'

;;

.

ELECT.RONIC ENG:INEERS ••• PHYSICISTS • •• CHEMISTS:

[J[J fjJ II[] @ [J[J fjJ [1 @ f} f} /1 ill 3'

CS [J{f bJ [1 [1/1 IXl@[]ixJ@ @[JJ[JJ@f]J JJ@fXlOJJ [f11 ~
W@@[fl [}Ol1f1§

odj

The National Cash Register Company-a
leader in the application of automation to
business machines-has organized its Research
and Development Division to provide ideal
working environments for technically trained
men and women of the highest calibre. Proj-

ects in progress are of an exciting, stimulating
nature . . . for instance, considerable work
is being done on Encapsulation and thin film
memory and switching components. Your
training and experience may qualify you for
a position in one of these areas:

DATA
PROCESSING
RESEARCH AND
DEVELOPMENT

ELECTRONIC
ENGINEERING
DEVELOPMENT

SOLID STATE
PHYSICS

CHEMISTRY

Computer Theory
Computer Component
Development
Machine Organization
Studies
High-Speed
Non-Mechanical Printing
and Multi-Copy Methods
Direct Character
Recognition
Systems Design

High-Speed Switching
Circuit Techniques
Random Access Memory
Systems
Circuit and Logical
Design
Advanced Storage
Concepts Utilizing
Electron Beams
Microminiaturization
of Components and
Circuitry

Electrodeposited
Magnetic Films
Vacuum Deposited Thin
Magnetic Films
Ferrites and
Ferromagnetics
ElectroluminescencePhotoconductor
Investigations
Advanced Magnetic
Tape Studies

Plastics and Polymers
Encapsulation
(A process for producing
microscopic capsules
containing liquids or
reactive solids)
Photochromic Materials
(Studies of Nationa/developed compounds
which are photosensitive
to specific wave lengths
of light, for application
to memory, printing and
photocopy devices)
Magnetic Coatings

NATIONAL'S NEW RESEARCH AND DEVELOPMENT Centar is located in Dayton,
Ohio, one of the midwest's most progressive cities. There are also attractive positions available
at our Electronics Division in Hawthorne, California.
.

*TRADEMARK REG. U. S. PAT. OFF.

~OR COMPLETE 'INFORMATION, simply send your resume to Mr. T. F. Wade, Technical
Placement, F-3A, The National Cash Register Company, Dayton 9, Ohio. All couespondence will
be kept strictly confidential.

THE!NATIONAL CASH REGISTER COMPANY,

Dayton 9, Ohio

ONE OF THE WORLD'S MOST SUCCESSFUL CORPORATIONS
1039 OFFICES IN 121 COUNTRIES. 75 YEARS OF HELPING BUSINESS SAVE MONEY
COMPUTERS and AUTOMATION for December, 1959

VEISATIIE DATA PIOCESSING
ADDING MACHINES • CASH IEGISTEIS
ACCOUNTING MACHINES • NCI PAPEI
DIVEISlflED CHEMICAL PIODUCTS
29

article describes the functions to be controlled by the computer, and illustrates
the economy and efficiency of the system.
The Real Pushbutton War / M. Carasso
/ Journal of Machine Accounting, vol.
10, no. 7, July, 1959, pp 7-12 / National Machine Accountants Assn., 720
Kensington Rd., Arlington Hts., Ill.
Computers which have decision-making
ability, will be used to control the mobilization of the U.S., if the "cold" war becomes "hot." Electronic data prf'':essing
will perform a mass of calculations' to direct industry in the mobilization. This
article describes a number of computer
systems which are performing fun'ctions
similar to the wartime operation. A hypothetical control system is discussed"MADCAP", or, Mobilization An~lyzer
for Determination and Control of Allocations and Priorities.

wanted:
WAR
GAME
PLAYERS

Very large-scale air-battle digital
computer simulations are now going on
at the Washington Research Office
of tech/ops. Present operations
call for top-flight mathematicians,
mathematical statisticians,
senior programmers, operations
research analysts.

These computer air battles are stochastic
models which involve design and
evaluation, and development of unusual
techniques for studying sensitivity
of these models to input changes.
Associated activity involves design of
advanced programming systems and
of common language carriers which are
expected to be independent of the
first computer used-the computer itself
augmenting and improving the
language for use on later and more
sophisticated computers.
If challenging work, stimulating
atmosphere, and an opportunity
to participate in an unusual
company/employee investment program
interest you ... write or wire collect:

Kingsley S. An dersson

..

Technical Operations, -'ncorporated
3520 PROSPECT STREET, NORTHWEST. WASHINGTON 7. D. C.

*Final position in the famed simultaneous exhibition at Pernau, 1910:
Nimzovich (white) vs Ryckhoff (black).

30

GE's 704-709 Provides a Dynamic Computer Approach to Business Measurements / A. Keller, Mgr., Operations
Research and Synthesis, General Electrk / Journal of Machine Accounting,
vol. 10, no. 7, July, 1959, p' -17 /
NMAA, 720 Kensington Rd., Adington Hts., Ill.
This article discusses a 704/709 computer program aimed at an integrated
solution to the total business numbers
Problem in General Electric's Medium
Steam Turbine, Generator, and Gear
Dept. The system will be used for scheduling, ordering, accounting, engineering
design calculations, and payrolls, among
other applications. The article inCludes
examples of information which the computer furnishes.
Developing Mathematical Models for
Computer Control/Dr. D. B. Brandon,
Thompson - RamO' - Wooldridge
Prods. Co., Los Angeles, Calif. / ISA
Journal, 'VQoI. 6, nO'. 7, July, 1959, P, 70
/ Instrument Society of Americi;- _313
Sixth Ave., Pittsburgh 22, Pa. "
ThIS paper describes a method which
has been successfully used in designing
mathematical models used in the development of computer control systems for processes. The paper emphasizes the interesting fact that the required equations
can be written for many incompletely understood processes.
"Fortransit," A Universal Automatic Coding System for the IBM 650 / B. C.
Borden, Applied Science Representative,
IBM / Journal of Machine Accounting,
vol. 10, no. 7, P 44 / NMAA, 720 Kensington Rd., Arlington Hts., Ill.
This paper deals with automatic programming in general, defining a number
of terms which are used in the "Fortransit" system. It includes as well, a review
of "Fortran," and an introduction to
"Fortransit," the automatic coding system for the IBM 650. It is hoped that
the new system will eliminate many delays that present programming methods
cause.

COMPUTERS and AUTOMATION for December, 1959

WHO'S WHO IN
THE COMPUTER
FIELD
(Supplement)
A full entry in the "Who's Who in
the Computer Field" consists of:
name / title, organization, address
/ interests (the capital letters of the
abbreviations are the initial letters
of Applications, Business, Construction, Design, Electronics, Logic,
Mathematics, Programming, Sales) /
year of birth, college or last school
(background), year of entering the
computer field, occupation / other
information such as distinctions,
publications, etc. An absence of information is indicated by - (hyphen). Other abbreviations are used
which may be easily guessed like
those in the telephone book.
Every now and then a group of
completed Who's Who entry forms
come in to us together from a single
organization. This is a considerable
help to a compiler, and we thank the
people who are kind enough to arrange this. In such cases, the organization and the address are represented by . . . (three dots).
Following are several sets of such
Who's Who entries.
Burroughs Corp., ElectroData Div., 460
Sierra Madre Villa, Pasadena, Calif.
Brown, Leland W / Electronic Engr, ...
/ A, punched card perif equip / '22,
Univ of Ark, '50, engr
Canova, G M / Assoc Engr, ... / ADEL
/ '3D, CIT, '54, electronic engr / Research Asst, E E Dept, Caltech '58-59
Lindley, P L / Mgr, Spec Products Engrg
Sec, . . . / ACDEL / '22, Ohio Wesleyan Univ, Purdue Univ, '47, electronic engr / M.S. Thesis "Magnetic
Recording for Digital Compr Memory,"
Member Sigma Xi, RESA
Reaction Motors Div., Thiokol Chemical
Corp., Ford Rd., Denville, N.J.
Behar, Joseph / Sr Prgmr, . . . / ALMP
/ '32, CCNY, NY Univ, '57, apld
mathn
Morrill, Duncan E / Supv, Compr Aplns
Unit, ... / AMP / '28, Univ of Miss,
'54, mathn
Robinson, Richard / Jr Prgmr, . . . /
AMP / '34, Farleigh Dickinson Univ,
'58, mathn
Shell Oil Co., Midland Area, PO Box
1509, Midland, Texas
Anstine, 1. Paul / prgmr, . . . / ABP /
'25, Hastings ColI, '57, data procg accnt
Bailey, Joe A / prgmr, . . . / ALMP /
- , Texas Univ, - , systems analyst
Fragapane, Lou C / prgmr, ... / ABMP
/ '3~, Pitt, Penn State, '56, mathn
Gant, William T / Chief, Data Processor,
. . . / ABDELMP / '27, Okla State,
'51, data procg

Hutto, J. Merrell / Supt of Machines,
· .. / ABP / '20, Hardin Simmons, '58,
machine operator
Romberg, F. Arnold / prgmr, . . . /
ABDLMP / '34, Rice, Harvard, '57,
mathn
Shaner, Douthea E / prgmr, . . . / ALP
/ '34, Texas Christian Univ, '57, prgmr
Thompson, Warren L / prgmr, . . . /
AMP / '19, L S U, '54, analyst
Tool, Myrtle A / prgmr, . . . / AIMP /
'29, Central State, Okla Univ, '57,
mathn
Wagner, Harry H / prgmr, ... / ABP /
'24, Univ of Nebr, '53, data proc accnt
Rechenzentrum der Rhein, Westf. Technischen Hochschule, Kramerstrasse 20-34,
Aachen, Germany
Haupt, Dieter / Diplom-Mathematiker,
• .. / ACLMP / '28, Rheinisch-Westfalische Technische Hochschule Aachen,
'56, math prgmg
Moeskes, Max / Diplom-Ingenieur, ... /
ACDELMP / '3~, Rheinisch-Westf1ilische Technische Hochschule Aachen,
'57, devt, prgmg, math
Bryant Computer Products Division, P.O.
Box 620, Springfield, V t.
Ashbridge, Jr, G Harry / Mgr, Prod Planning, . . . / ABES / '29, III lnst of
Tech, '55, electronics engr-bus mgr /
Triangle, RESA
Casey, James P / Asst Sales Mgr, . . . /
S / '28, Brown Univ, '58, sales engr
Cheney, George D / design engr, . . . I
D / '3D, MIT, mech engr
Foley, Tim / Western Sales Mgr, . . . /
S / '28, Seton Hall Univ, '50, sales engr
Forand, Joseph / Sales Engr, ... / BS /
'29, Norwich Univ, '58, sales engr
Foster, Theodore C / Electronic Components Dept Foreman, ... / A, mfg / '33,
Northeastern Univ, '56, ind engr
Francois, Alex C / Circuit Designer, ...
/ DEL / '26, Fairleigh Dickinson Univ,
- , electronic engr
Karpin, Jay H / Devt Engr, . . . / D /
'24, I.C.S., '58, tool engr
Lohan, Frank J / Sr Devt Engr, . . . /
ELM / '29, Drexel Inst of Techn, '50,
devt engr
Mitchell, Darrell L / Supv of Engrg
Stds & Design, ... / D / '22, Univ of
N.H., '55, mech engr
Pozner, W S / Prodn Mgr, ... / C / '18,
Pratt Inst, '55, mfg engr
Q~ick, Lloyd S / Supv of Assy & Test,
· . . / Assy & testing of memory systems / '32, Cornell Univ, '57, mechl
engr
Ripley, Merton L / Chief Designer, . . .
/ D / '29, Dunwoody Inst, '56, designer
Ramon, Ray J / Midwest Sales Mgr, . . .
/ ADELS / '24, Northwestern Univ,
,47, component design; sales
Smith, Joseph E / Genl Mgr, . . . /
ABCDS, electro-mech & magnetic mem-'
ory systems, electro-mechl peripheral
eqpm / '21, Lehigh Univ; '55, mngt /
several patents on electro-mechl file
Smith, Prentiss L / Sales Mgr, . . . /
ABDES / '22, Norwich Univ, '56, sales
Spahr, J. Alan / Sales Engr, ... / AS /
'34, MIT, '57, sales engr
Stover, Richard A / Chief Engr, . . . /
comp design / '29, Utiiv of Maine, '56,
mechl engr

COMPUTERS and AUTOMATION for December, 1959

and at tech/Ops'
Monterey
Research Office, in
California, equally
interesting and
challenging work
developing computer
applications for
planning, feasibility
testing, and real' time
control of operational
and logistical problems
(for the Navy and
industry) ...
Here, too, tech/ops needs
scientists who habitually
seek original thought
patterns, and who
respond to challenge. The over-all Company
policies in the areas of
fringe benefits and
profit-sharing plans
are unique.
If challenge and reward
appeal to you ... write
or wire collect:
Harold E. Kren

Technical
Operations,

Incorporate:........

~

305 WEBSTER STREET
MONTEREY, CALIFORNIA

31

NEW PATENTS
_.~(W~.~'"
TIID· ~ ~ (ffi ~
"',

:t". '~;, ~,

.,,'1

I 'I

I

,',

,;

,"I

,

SCHIDUU
"MfSAVfftS:
~~

With T·PACs you go
directly from your logical
design to system wiring.

A rush. project to implement a high speed digital
data handling or computint system.

Wiring is rapid,
reliable, and permanent, yet, is
easy to modify at any time.

~~

Standard T-PAC digital
modules by Computer Control.
.

System debugging is routine,
thanks to standard logical
elements and
standard waveforms.

~.

Transistorized - compact
- plug-in modules - etched.
.circuits - taper· pin solderlesa connee.tors - one
~egacy~le . rep.etition rate'
- standard waveform
throUghout - reliable - no
external- to - the - package
coupling components fully guaranteed Write for product catalop

~ ~ ~ Il:ft:a,
813 C::ON.C;:ORD STREET --..

FRAMINGILUI

•

MASSACHUSETTs

.•.)"~~

waTERN DIVISION
2251 IMftRY AVENUE. • LOS ANGELES ..

32

•

CALIFORNIA

RAYMOND R. SKOLNICK I)
Reg. Patent Agent
. tl~;
Ford Inst. Co., Div. of Sperry Rand Corp.
Long Island City 1, New York

HE fol1owin~ i~ a compilation of
patents pertalrung 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 number / inventor (s) / assignee / invention. Printed copies
of patents may be obtained from the
U.S. Commissioner of Patents, Washington 25, D.C., at a cost of 25
cents each.

T

June 2, 1959 (cont'd):
2,889,543 / Erich Block, Poughkeepsie,
N.Y. and RDbert C. Paulsen, Boonton,
N.J. / International Business Machines
Corp., New York, N.Y. / A magnetic
not or circuit.
June 9, 1959: 2,890,439 / Raymond Bird,
Letchworth, and Brian Taylor, Wiltshire, Eng. / The British Tabulating
Machine Co., Lim., London, Eng. / A
data storage apparatus made up of a
matrix of storage devices.
2,890,441 / Simon Duinker, Eindhoven,
Netherlands / North American Philips
Co., Inc., New York, N.Y. / A magnetic memory Device.
June 16, 1959: 2,890,829 / J. R. Logan,
Norristown, Pa. / Sperry Rand Corp.,
a corp. of Del. / A logical binary Powering circuit.
2,890,830 / W. Letchworth, Eng. / The
British Tabulating Machine Co., Lim.,
London, Eng. / An electronic adder apparatus with sum radix correction
means.
2,890,831 / Ralph Townsend, Letchworth,
Eng. / The British Tabulating Machine Co., Lim., London, Eng. / A
serial adder with radix correction.
2,891,237 / Robert L. Sink, Altadena,
and Glyn A. Neff, Pasadena, Calif. /
A data processing apparatus.
2,891,238 / David L. Nettleton, Haddonville, N.J. / Radio Corp. of America, a
corp. of Del. / A memory system.
June 23, 1959: 2,891,723 / Edward A.
Newman, Teddington, Donald W.
Davies, Southsea, and David O. Clayden, Heston, Eng. / National Research
Development Corp., London, Eng. / A
programmed control means for data
transfer apparatus.
2,891,724/ Otto P. Fuchs, Haverford, Pa.,
and Horst Kottas, Vienna, Austria /
- - - / An automatic apparatus for
transforming statistical or stochastical
functions.
2,891,725 / Irwin S. Blumenthal, Manhattan Beach, Ross M. Chiles and Chester
W. Larsen, Jr., Inglewood, and Kenneth M. Stevenson, Jr., Palos Verdes,
Calif. / Northrop Corp., Hawthorne,
Calif. / A reset integrator.
COMPUTERS and AUTOMATION for December, 1959

I Richard O. Decker, Murrysville, and Kan Chen, Wilkinsburg, Pa.
I Westinghouse Electric Corp., East
Pittsburgh, Pa. I I A four quadrant
analog multiplier circuit.
2,891,727 I Paul Kaufman, Deal, N.J. I
- - - I An analogue device for computing the numerical value of the
standard deviation of a given set of numerical values.
2,891,728 I Nick A. Schuster, Ridgefield,
Conn. I Schlumberger Well Surveying
Corp., Houston, Tex. I An electronic
computing apparatus for computing a
root or a power of the ratio of two
quantities.
2,892,084 I Dwight D. Wilcox, Jr., Los
Altos, Calif. I U.S.A. as represented by
the Sec. of the Navy I A pulse gating
circuit.
2,892,103 I Alfred D. Scarborough, Los
Angeles, Calif. I Thompson Ramo
Wooldridge, Inc., Cleveland, Ohio I
Gating circuits for electronic computers.
2,<892,147 I Morton W. Bell, Monrovia,
Calif. I Consolidated Electro-dynamics
Corp., Pasadena, Calif. I A digital-toanalog converter.
June 30, 1959: 2,892,587 I John V.
Blankenbaker, Los Angeles, Calif. I
Hughes Aircraft Co., a corp. of Del. I
An arithmetic unit for performing an
operation of addition or subtraction
upon binary-coded decimal numbers
represented by electrical input signals.
2,892,588 I Frederic C. Williams, Timperley, Tom Kilburn, Davyhulme, Manchester, and Arthur A. Robinson, Scunthorpe, Eng. I International Business
Machines Corp., New York, N.Y. I A
multiplying arrangement for digital
computing machines.
2,892,589 I Robert T. Blakely, Poughkeepsie, N.Y. and Dorval C. Sprong,
Long Beach, Calif. I An electronic accumulator.
2,892,590 I Joseph R. Esher, Jr., Schenectady, N.Y. I General Electric Co., a
corp. of N.Y. I An apparatus for generating a trigonometric function and
multiplying by a D.C. voltage.
July 7, 1959: 2,893,636 I Herman D.
Parks, Schenectady, N.Y. I General
Electric Company, a corp. of N.Y. I
A network for effecting mathematical
multiplication.
2,894,151 I Louis A. Rusell, Poughkeepsie, N.Y. I International Business Machines Corp., New York, N.Y. I A
magnetic core inverter circuit.
2,894,253 I Lawrence R. Peaslee and Murray Rosenblatt, Waynesboro, Va. I
General Electric Co., a corp. of N.Y.
I A selsyn exciter for positioning programming control systems.
2,894,254 I Raymond P. Mock, Needham
Heights, Mass. I Raytheon Co., a corp.
of Del. I A conversion of binary coded
information to pulse pattern form.
July 14, 1959: 2,894,686 I Thomas G.
Holmes, Melbourne, Fla. I - - - I A
binary coded decimal to binary number
converter.
2,<895,124 I Ben A. Harris, Rochester,
N.Y. I General Dynamics Corp., Rochester, N.Y. I A magnetic core data
storage and readout device.
2,891,726

There's no question about it-if there were a dropout in this
inch of tape it could cost you plenty. That's why our customers invariably demand perfection from our EP Audiotape
-the extra precision magnetic recording tape for computers,
automation, telemetry and seismography.
Audio Devices' battery of Automatic Certifiers is one of
the unique means used to make sure EP Audiotape always
meets customers specifications. The Automatic Certifier records and plays back every inch of the EP Audiotape under
test. These tests can be so demanding that if the tape fails to
reproduce just one test pulse out of the 40 million put on a
single reel, the entire reel is rejected. There are no if's, and's,
or but's.
This is just one of many special quality-control operations. From raw material to hermetically sealed containers,
every reel of EP Audiotape gets individual attention.
For more information write for free Bulletin Tl12A.
Write Dept. TL, Audio Devices, Inc., 444 Madison Avenue,
New York 22, N.Y.

COMPUTERS and AUTOMATION for December, 1959

TYPE

[§[?
ALIDID DEVICES, INC.
444 Madison Ave., N. Y. 22, N. Y.
In Hollywood; 840 N. Fairfax Ave.
In Chicago: 5428 Milwaukee Ave.
Export Dept.: 13 East 40th St., N. Y., 16
.
Rectifier Division: 620 E. Dyer Rd., Santa Ana, Calif.

33

July 21, 1959: ~,895,671 / Andrew St.
Johnston, Buntingford, Eng. / International Business Machines Corp., New
York, N.Y. / An electronic digital
computing machine.
2,895,672 / Arthur H. Dickinson, Greenwich, Conn. / International Business
Machines Corp., New York, N.Y. /
An electronic multiplying system.
2,895,673 / Frederic C. Williams, Romiley, Eng. / National Research Development Corp., London, Eng. / A transistor
binary adder.
2,895,783 / Samuel G. Cohen, Ossining,
N.Y. / General Precision Lab., Inc., a
corp. of N.Y. / A data correlator for
correlating by serial numbering two
data recorders emitting graphic and
punched card records respectively of
identical data.
2,896,193 / Richard C. Herrmann, Chicago, Ill. / Zenith Radio Corp.; a corp.
of Del. / A magnetic memory storage
apparatus.
2,896,198 / Robert, R. Bennett, Los Angeles, Calif. / Hughes Aircraft Co., a
corp. of Qel. / An electrical analog-todigital converter.
July 28, 1959: 2,897,355 / Arnold Lesti,
Arlington, Va. / International Standard
Electric Corp., New York, N.Y. / A
diode coincidence gate.
2,897,380 / Carl Neitzert, Morris County,
N.]. / General Time Corp., New York,
N.Y. / A magnetic pulse counting and
forming circuit.
2,897,480 / Tom T. Kumagai, West Los
Angeles, Calif. / Hughes Aircraft Co.,
Culver City, Calif. / An error detecting
system.
2,897,482 / Milton Rosenberg, Santa Monica, Calif. / Telemeter Magnetics, Inc.,

a corp. of Calif. / A magnetic core
memory system.
2,897,486 / Matthew A. Alexander and
Raymond Stuart-Williams, Pacific Palisades, Calif. / Telemeter Magnetics,
Inc., a corp. of Calif. / An analog-todigital conversion system.
August 4, 1959: 2,898,040 / Floyd G.
Steele, La Jolla, Calif. / Digital Control Systems, Inc., a corp. of Calif. /
A computer and indicator system.
2,898,041 / Hubert ]. Crawley, Beckenham, and Christopher Stracheg, London,
Eng. / International Business Machines
Corp., New York, N.Y. / An instruction modifier means for electronic digital computing machines.
2,898,043 / Robert A. Mathias, Pittsburgh, and Leo A. Finzi, Irwin, Pa. /
U.S.A. as represented by the Sec. of
the Navy / An electronic circuit for
performing analytic operations.
2,898,460 / Morris J. Taubenslag and Edward G. May, Baltimore, Md. / U.S.A.
as represel,?-ted by the Sec. of the Navy
/ A D.C. Discriminator gating circuit.
2,898,578 / Floyd G. Steele, La Jolla,
Calif. / Digital Control Systems, Inc.,
La Jolla, Calif. / A magnetic reading
device for selectively passing an applied timing signal to either a first or
second output terminal, respectively.
August 11, 1959: 2,899,133 / John G.
Tryon, Chatham, N.J. / Bell Telephone
Laboratories, Inc., New York, N.Y. /
A serial binary computing circuit for
adding or subtracting two binary numbers in which the digits of the numbers
appear successively spaced by a predetermined time period.
2,899,134 / Yves Rocard\ Paris, Fr. I
Compagnie Generale de Telegraphie

A D V E .R' TIS I N G
Following is the index of advertisements. Each item contains:
Name and address of the advertiser / page number where the
advertisement appears / name of agency if any.

Ampex Corp., Instrumentation Div., 934 Charter St.,
Redwood City, Calif. / Page 5/ McCarn Erickson, Inc.
Audio Devices, Inc., 444 Madison Ave., New York 22,
N.Y. / Page 33 / Marsteller, Rickard, Gebhardt &
Reed, Inc.
'
Bell Aircraft Corp., Buffalo, N.Y. / Page 34 / The
Rumrill Co., Inc.
Bendix Aviation' Corp., Computer Div., 5630 Arbor
Vitae St., los Angeles, Calif. / Page 35 / Shaw Advertising Inc.
Bendix Products Div., 401 No. Bendix Dr., So. Bend.,
Ind. / Page 26 / MacManus, John & Adams, Inc.
Broadview Reesarch Corp., 1811 Trousdale Dr., Burlingame, Calif. / Page 24 / 1. C. Cole Co., Inc.
Computer Control Co., 983 Concord St., Framingham,
Mass. / Page 32 / Briant Advertising
Computer Systems, Inc., 611 Broadway, New York 12,
N.Y. / Page 27 / Smith, Winters, Mabuchi, Inc.
Hughes Products, Industrial Systems Div., International
Airport Station, los Angeles 45, Calif. / Page 25 /
Foote, Cone & Belding
34

DIGITAL ANALYST
To logically design,
evaluate and select digital
computers for inertial
guidance and surveillance
systems programs. Experience
desired in digital systems
analysis, logical systems
design, Z transform analysis
of digital servo loops and
digital computer error
analysis.
To arrange interview call
collect, Niagara Falls
BUtler 5-7851, or send
resume to:

Supervisor Engineering
Employment I

BELL AIRCRAFT
CORPORATION
BUFFALO 5, NEW YORK

Sans Fil, a corp. of Fr. / An electrical
analog computing system for solving
ordinary and partial non-linear differential equations.

IN D E X

Information Systems, Inc., 7350 No. Ridgeway, Skokie,
Ill. / Page 22 / A. N. Baker Advertising Agency, Inc.
The Mitre Corp., 244 Wood St., lexington 73, Mass. /
Page 2 / Deutsch & Shea, Inc.
'
National Cash Register Co., Dayton 9, Ohio / Pages 26,
29 / McCann Erickson, Inc.
Philco Corp., Government & Industrial Div., 4700 Wissahickon Ave., Philadelphia 44, Pa. / Page 3 / Maxwell Associates, Inc.
Radio Corp. of America, Semiconductor and Materials
Div., Somerville, N.J. / Pages 7, 36 / Al Paul Lefton
Co., Inc.
The Ramo Wooldridge laboratories; 8433 Fallbrook
Ave., Canoga Park, Calif. / Page 21 / The McCarty
Co.
Space Technology laboratories, Inc., P.O. Box 95004,
los Angeles 45, Calif. / Page 23 / Gaynor &
Ducas, Inc.
Technical Operations, Inc., 3520 Prospect St., N.W.,
Washington 7, D.C. / Page 30 / Dawson Macleod
& Stivers
Technical Operations, Inc., 305 W.ebster St., Monterey,
Calif. / Page 31 / Dawson Macl~od & Stivers
COMPUTERS and' AUTOMATION for December, 1959

"Our detailed
analysis proved
the Bend'ix 6-15
comp'uter
the sou ndest '
purc;hase.
Here's 'why"

ROBERT C. MEISSNER,
"RESIDENT.
MEISSNER ENGINEERS. INC.
CHICAGO. IlliNOIS

Over 200 firms are enthusiastic users of the Bendix G-15 computer. Many, like the consulting engineering firm of Meissner Engineers, Inc., are involved in the heavy construction
industry. Before purchasing, Meissner meticulously studied all medium- scale computers.
"Only the G-15 gives'us the speed, expandability, price: and ease of operation we require,"
says Mr. Meissner.
Mr. Meissner continues:
Speed: "The G-15 is faster than other computers in its price range, and for many
problems gives us the answers we need
in less than 1 % of the time required by
manual methods."
Expandability: "The variety of accessories
for the G-15 is a very important feature.
As we developed and, expanded our applications, we added magnetic tape units,
punched card equipment,
and other special accessories."
Ease of Operation: "Our engineers find the G-15 Intercom 1000 programming
system easy to master. It
permits them to write versatile programs which can
handle practically all of
our problems."
II

.,

The G-15 is the leader in its field for many
other reasons as weI!: A price much lower
'than any other medIum-scale computer, a
built - in, magazine - loaded photoelectric
paper tape reader, and tape punch as
standard equipment, an active user's group
that shares hundreds of proven programs,
and fast, nationwide service.
'I

G-15's are being applied successfully in a
great many fields - business data processing, scientific and engineering calculations. Write us your specific problems.

",/u,;,;;;f~
'W'w

,

:'/"<,~'

]

o~ ',o~,~Qm~Q~e~':l

o:,J
DIVISION OF BENDIX AVIATION CORPORATION

;', DEPT. 0-17
LOS ANGELES 45, CALIFORNIA

COMPUTERS and AUTOMATION for Deceq;tber, 1959

35

Ch a ra cter istics : Common-Em itte r Circu it,
Base Inp ut- Amb ient Te mpe rature= 2So C

Ma xi mum Rating s-Absolute-Ma x im um Valu es
RCA

Minimum DC Current

Transistor Dis sipotion

GainBandwidth

Collecto r-

Col lector-

Emitter-

to - Bose

to - Emitter

to-Base

Vo lts

Va lls

Vo lts

2N1 300

- 13

- 12

-1

-100

150

75

35

30

-

40

2N1301

- 13

- 12

- 4

-100

150

75

35

30

40

60

TYPE

AF or collector rna

==

-10 and col l ector-ta-emitter vo lts

=

Mo.

Tran sfer Ratio

M illiwatts

Collector
at 25 c e

at 55 0 e

at 71

• high current transfer ratio-permits
high fanout ratios (number of paralleled
similar circuits per dri ver-stage ou tpu t)

e

rna

==

- 10

at collec tor
rna
- 40

==

Product"
Me

- 3

RCA's Germaniu m P-N-P Mesa Transistors 2N1300 and 2N1301 c,ombine
low-cost and quantity availability with these major ben efits for designer s
of switching circuits:
• high power dissipation-150 milliwatts
maximum at 25 °C, 75 milliwatts maximum at 55 °C
• fast switching times-made possible by
high frequency response and low total
stored charge
• rugged M esa structu re-with an extremely small base width to insure top
performance at high frequencies

0

at (ollector

• high breakdown-voltage and punchthrough voltage ratings-result of the
diffusion process
• high current ratings-improves overall
system speed
• especially well su ited for use at pulse
repetition rates up to 10 Mc
• rugged overall design-units have unusual capabilities to withstand severe.
drop tests and electrical overloads
• electrical uniformity-a resJlt of the
diffused-junction process US f., r1 1:Jy R CA
in the manufacture of Mesa '.1'r .;istors

Contact you r RCA Field Representative for prices and delivery. For technical data, see your H B-lO Semiconductor Products Handbook, or write
RCA Commercial Engineering, Section L-90-NN, Somerville, N. J .
.' ~.,

.

aCA FIELD OfFICES

Eo."

744 Broad St. . Newa rk. N. J.
HUmboldt 5·3900

Horth...." 64 " A" Stree t. Ne edh a m Heights 94. Ma ss .
H illcrest 4-7200

f o.tCenlroh 714 New Cente r Bld g .• De troit 2. Mich.
TR inity 5-5600

Central, Suite 11 54 , Me rchan dise Mart Plaza,
Ch icago 54 . III.• WH itehal l 4-2900
W •• , . 6355 E. Was hin gto n Blvd .•
Los Angeles 22. Cali f.. RAymond 3-836 1

Goy',!

224 N. Wilkinson Stree t, Day ton, Ohio

BAldwin 6-2366
1625 "K" Stree t. N.W .• W as hing ton. D.C.
District 7-1260

ALSO AVAILA B LE THROUGH YOUR LOCA L
RCA S EMICONDUCTOR DISTRIBUTOR.



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