🚀 go-pugleaf

<adaworks@sbcglobal.net> wrote in message
news:5QCpf.36782$q%.31246@newssvr12.news.prodigy.com...
>
> 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.

The AS/400 has IBM PL/I

> Richard Riehle