> On May 29, 2018, at 10:10 AM, Bill Degnan <billdeg...@gmail.com> wrote: > > Is AIS the same as AIDCS? > > http://vintagecomputer.net/digital/IDACS_11-07/ No. IAS (not AIS) is an RSX-11/D variant that intended to add timesharing capabities to RSX-11/D. RSX-11/D was pretty much limited to fixed purpose real-time and turnkey applications (such as Typeset-11) because of the inflexible way in which it managed memory through "partitions". That term also shows up in RSX-11/M, I think, but in /D it was quite rigid and not suitable for situations where the applications to be run were not known ahead of time -- as would happen in timesharing systems with programmers using it. paul
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