05_Standard_Flow_Chart_Symbols_For_RECOMP_II_Jan60 05 Standard Flow Chart Symbols For RECOMP II Jan60

User Manual: 05_Standard_Flow_Chart_Symbols_For_RECOMP_II_Jan60

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1.

.Q.

.Y.

A DIVISION OF NORTH AMERICAN AVIATION, INC.

INDUSTRIAL PRODUCTS
3584 Wilshire Blvd

0,

Los Angeles 5, Calif

0

January 4, 1960

RECOMP TECHNICAL BULLETIN NO 5
0

TITLE:

STANDARD FLOW CHART SYMBOLS FOR RECOMP II

PURPOSE:

The purpose of this bulletin is to specify standards for
RECOMP II Flow Chart Symbols
0

EFFECTIVE DATE :

January 4, 1960

CONTENTS:

The symbols defined below are intended to agree with, and
augment the symbols in Reference 10
Ao

Operation
NAME

overflow
The box symbol will be used to 1) describe a working block
of instructions 2) specify formulas or substitution expressions
or 3) to indicate a program switch setting (flag)o The
symbolic on absolute location that heads the computation in
the box should be printed for identification to one side of
the box ("NAME")o Each box should have only one entry point
and one exit point, overflow exits exceptedo
Bo

Decision or Comparison

The oval symbol will be used to specify a two or more,
branch decision or comparison rfhe colon tn1ans "The
relationship betweon"o
0

Revised:

}l'e bruary 11, 1960

RECOMP TECmnCAL BULLETIN NO" 1 (Cant,,)

The large circle will be used to connect parts of a flow
chart
These facilitate communication between parts of
a complex or multipaged flow charto
0

®--------t:C>-~.

Variable Connector

@----if>~

@~----II>~

---~f>"" €).~

6J)-~[>~

x '/

6)~--~l>;:;r...
The small circle will be used to indicate a variable
connector that branches to one of several points according
to a predetermined program switch setting 9 which was set
by a box s~mbolo Greek letters should be used to label
the switcho rl'he X subscriptlndicates the uNOR1flAL" or
uUN_PRESBNTvi switch position 9 if any
0

Eo

Subroutine

The hexagon will be used to specify that an open subroutine 9
or the calling sequence to a closed subroutine? oqcurs at
this point in the flow charto This symbol may have many
exitsp each of which should be labeled o
F

0

Assertion

I>
A box connected to the flow by a dotted line will be used
to assert parenthetical remarks which are pertinent at the point
of connectiono

RECOMP TECHNICAL BULLETIN NOD 1 (Conto)

Go

Terminals

The half~ovals will be used to indicate the origin of a
program or programmed stopso

The diamond will be used to indicate that a large region
of code is entered at this point but that the flow chart
for the code appears elsewhereo This should not be used
for subroutines
o

10

Input or Output

The triangle will be used to indicate input and output
sequences
It may also be used 9 instead of the hexagon g
to indicate input or output subroutines
0

o

Jo

Tape Control

Ent~

c
The elongated oval will be used to indicate an entry from
a tape start codeo

RECOIllP TECHnICAL BULlliTIN NO 0 1 (Cont 0)

RBFERENCES:

1VACM First Glossary of Programming Terminologyli reprinted as
"Proposed Standard Flow Chart Symbolso U ACM Communications~
October 19590

INFORIvlATION TO ~

All Concerned

WRITTEN

BY~

Mo Berman
Advanced Systems

RECOMP TECHNICAL BULLETIN

115

APPENDIX 1

EXAMPLE:

tape has
final "B" for
automatic
start

COMPU'I'E
A

COMPUTE
B

A

Average
two numbers

B

SUBROUTINE

t(A+B) ~ A

=
A --7 A
2

stop

This program inputs a record of values from paper tapeo This data tape
has a start code on it that transfers control to Symbolic Location Al
after entry of the datao The parameters A and B are then computedo
If A = B, t A and A are output Otherwise A + B and B are output
0

0

2

Revised:

!t'ebruary 11, 1960



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