Re: IBM and float decimal

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#259

From: adaworks
Date: Mon, 19 Dec 2005 18:18

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"Peter Flass" <Peter_Flass@Yahoo.com> wrote in message
news:Svz7f.100111$7b6.38895@twister.nyroc.rr.com...
> John W. Kennedy wrote:

> > And 360/20 PL/I, I think.
> >
>
> Was there ever such a thing??? Never heard of it.
>
The IBM System 360, Model 20 was an entry level
machine intended for people transitioning from environments
such as the IBM 407 and 402 environments.  These were
sometimes called EAM (Electronic Accounting machines) and
they operated on punched cards with plug-board panels that
could be reconfigured to handle a wide variety of jobs.

The Model 20 was largely incompatible with the rest of the IBM
360 line.  Most of the progams were written in RPG.  The OS
was totally different from anything else in the 360 family and I
recall the version of that OS called BPS (Basic Programming
Support).

While there were eventually compilers for COBOL and some level
of PL/I, few IBM customers used anything except RPG.   Most
customers were happy to simply transfer their EAM applications
to the Model 20.   Intial deployments of this system required a
continued dependency on punched cards.   Tape was available.
Over time the system did evolve to support a greater variety of
storage devices.

Eventually, IBM introduced the System 36 and other machines that
were a complete departure from the 360 line and many of the Model
20 users were able to migrate to those systems.   The next step was
the AS 400 line.  I don't think System 36 or AS 400 provided support
for PL/I, but the AS 400 became one of the best products IBM ever
produced for small business accounting systems.

Richard Riehle

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