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File No. 5360-25 (OS)
Order No. GY28-6638-2




Program Logic




IBM System/3S0 Operating System
FORTRAN IV (G) Compiler
Program Logic Manual

Program Number 360S-FO-S20




This publication describes the internal logic of the
FORTRAN IV (G) compiler.

Program Logic Manuals are intended for use by IBM
customer engineers involved in program maintenance, and
by systems programmers involved in altering the program
design. Program logic information is not necessary for
program operation and use; therefore, distribution of
this manual is limited to persons with program main-
tenance or modification responsibilities.

The FORTRAN IV (G) compiler is a.processing program
of the IBM System/360 Operating System. It translates
one or more source modules written in the FORTRAN
language into an object module that can be processed
into an executable load module by the linkage editor.




Restricted Distribution
This publication provides customer concepts and Facilitie~, Form C28-6535
engineers and other technical personnel
with information describing the internal Supervisor and Data Management Macro-
organization and operation of the FORTRAN Instructions, Form C28-6647
IV (G) compiler. It is part of an inte~
grated library of IBM system/360 Operating Linkage Editor, Program Logic Manual,
System Program Logic Manuals. Other publi- Form Y28-6610
cations required for an understanding of
the FORTRAN IV (G) compiler are: System Generation, Form C28-6554

This publication consists of two
sections:
Principles of Operation, Form A22-6821
Section 1 is an introduction that
describes the FORTRAN IV (G) compiler as a
whole, including its relationship to the
Introduction to Control Program Logic, operating" system. The major components of