The FORTRAN Language
The
1620
Data
Processing
System
8
and
eve
nt
s
that
occur
at
this time are referred
to
as occurring
at
comp
il
e
ti
m
e.
The term object lime refers to events that occur while the object program
is
being executed.
Th
e diagram which follows illustrates this sequenc of events.
Source
COMPUTER
•
Program
( Cards
Compile
FORTRAN
Time
Pro
cessor
I
Object
Program
••••
•••
in
Mo
c
hi ne Language
+
Input
COMPUTER Results
Data
Object
~
Time
Th
e
FOHTRA
T language
is
composed of the individual comma
nd
s or stat
em
nts
of a program consisting of operation symbols
(+
or
-),
and
ex
pr
ess
ions
(A+B-C).
Statem
nt
s are the sentences of the
FOHTRA
I language. Th y may:
1.
De
fin
e the arithtnetic ste
ps
which are to be accomplished by the com-
put
e
r.
2.
Provide information for
co
ntrol of the comput
I'
during th execution of
the program.
3.
Describe input and output operations which are necessary
to
bring in
data
and
punch or write the resul
ts.
4.
Sp cify certain additional facts such
as
th
e size 'of the input data that
is
read by the program.
Th
e mM 1620
Data
Processing System
is
an electronic computer
sys
tem designed
for scientific and technological applications. The use of
so
lid
-s
tate circuit com-
ponents and the availability of from 20,000
to
60
,
000
positions of core storage
prOVid
e the 1620 system with the 'Capacity, reliability, and speed to
so
lve prob-
lems that in the past have required th use of larg r
data
processing systems.
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