IBM System/370 145 Manual page 155

SECTION 30: PROGRAMMING SYSTEMS~ SUPPORT OF THE MODEL 145 IN BC MODE
30:05 TRENDS IN
~
PROCESSING, AND PROGRAMMING SYSTEMS
The Model 145 and its programming systems support have been designed
to operate in the data processing environment that has been emerging
since the introduction of system/360.
Significant trends are the following:
• Growth toward more multiprogramming to improve system throughput.
Multiprogramming also permits the installation of new applications,
such as small teleprocessing inquiry or graphics applications, that
otherwise would not 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 ~ontrlol improves system throughput because
emulators can use control program facilities (stacked job execution,
data management functions, e'tc.) and because native mode and
emulator jobs can be schedul1ed to operate concurrently to. utilize
available system resour~es more efficiently. The use of integrated
emulators el iminates most reJ!?rogramming and eases transition from
one system to another, permi
1
t.ting the user to expend his efforts
extending and adding applica~tions.
• Greater use of high-level languages, such as COBOL, FORTRAN, and
PL/I, for applications progr;amming_ The cost of programming has
been increasing, while the ClOst of computing hardware has been
decreasing_ More productive use of programmers can
be
achieved by
the use of high-level languai;Jes. Improvements to compile times and
to the size and execution sp~eed of code produced by high-level
language translators have be~en made and continue to
be
made. The
support of many more functions within high-level languages has also
increased their use, and the growth of interactive computing has
stimulated the addition of e'~en m.ore facilities.
• Growth of teleprocessing applications, such as remote inquiry,
message switching, data
coll~ection,
and management information
systems. The ability of Sys1tem/360 and System/310 to handle
teleprocessing' and batcq proc:::essing in one system eliminates the
necessity of dedicated, special purpose systems.
• Growth of remote computing ac:::ti vi ties, such as remote job entry and
interactive computing (or tilRe sharing), in both a nondedicated and
a dedicated
environment~ Rel~e
computing offers
(1)
fast
turnaround for batch work submitted from remote locations, (2)
remote user access to the lalrge computing facilities and data base
available at the central ins1:allation, 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, ]Low-cost, reliable direct access devices
supported by appropriate data organizations, access techniques, and
A Guide to the IBM system/310 Model 145