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IBM System/370 Guide

IBM System/370
194 pages
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SECTION
30:
PROGRAMMING
SYSTEMS
SUPPORT
30:05
TRENDS
IN
DATA
PROCESSING
AND
PROG~NG
SYSTEMS
The
Model
165
and
its
programming
systems
support
have
been
designed
to
operate
in
the
data
processing
environment
that
has
been
emerging
since
introduction
of
System/360.
52
Significant
trends
are
the
following:
•
Growt~
toward
more
multiprogramming
to
improve
system
throughput.
Multiprogramming
also
permits
the
user
to
install
new
applications,
such
as
small
teleprocessing
inquiry,
graphics,
or
time-sharing
applications,
that
would
not
otherwise
justify
a
dedicated
system.
Multiprogramming
support
also
has
encouraged
the
growth
of
new
computer
environments,
as
indicated
by
the
items
that
follow.
•
Growth
of
integrated
emulation,
that
is,
concurrent
native
and
emulation
mode
processing
on
one
system.
The
execution
of
emulators
under
operating
system
control
improves
system
throughput
because
emulators
can
use
control
program
facilities
(stacked
job
execution,
data
management
functions,
etc.)
and
because
native
mode
and
emulator
jobs
can
be
scheduled
to
operate
concurrently
to
utilize
available
system
resources
efficiently.
The
use
of
integrated
emulators
eliminates
most
reprogramming
and
eases
transition
from
one
system
to
another,
permitting
the
user
to
expend
his
efforts
extending
and
adding
applications.
•
Greater
use
of
high-level
languages,
such
as
COBOL, FORTRAN,
and
PL/I,
for
applications
programming.
The
cost
of
programming
has
been
increasing
while
the
cost
of
computing
hardware
has
been
decreasing.
More
productive
use
of
programmers
can
be
achieved
by
the
use
of
high-level
languages.
Improvements
to
compile
times
and
to
the
size
and
execution
speed
of
code
produced
by
high-level
language
translators
have
been
made
and
continue
to
be
made.
The
support
of
many
more
functions
within
high-level
languages
also
has
increased
their
use,
and
the
growth
of
interactive
computing
has
stimulated
the
addition
of
even
more
facilities.
•
Growth
of
teleprocessing
applications
such
as
remote
inqUiry,
message
switching,
data
collection,
and
management
information
systems.
The
ability
of
System/360
and
System/370
to
handle
teleprocessing
and
batch
processing
in
one
system
eliminates
the
necessity
of
dedicated
special
purpose
systems.
•
Growth
of
remote
computing
activities,
such
as
remote
job
entry
and
interactive
computing
(or
time-sharing)
in
both
a
nondedicated
and
dedicated
€nviro~~ent.
Remote
computing
offers
(1)
fast
turnaround
for
batch
work
submitted
from
remote
locations,
(2)
remote
user
access
to
the
large
computing
facilities
and
data
base
available
at
the
central
installation,
and
(3)
interactive
problem
solving
on
a
regular
or
a
nonscheduled
basis
for
personnel
in
locations
remote
from
the
central
computer.
In-house
interactive
computing
is
growing
also
as
users
attempt
to
use
programmer
time
more
efficiently.
•
Growth
toward
large,
online
data
base
systems.
The
growth
in
the
marketplace
of
remote
computing,
time
sharing,
and
real-time
applications
necessitates
the
instant
availability
of
more
and
more
data.
High-capacity,
fast,
reliable
direct
access
devices
are
required
for
this
type
of
computing
environment.

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IBM System/370 Specifications

General IconGeneral
BrandIBM
ModelSystem/370
CategoryServer
LanguageEnglish

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