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From: dmr@alice.UUCP
Newsgroups: comp.misc
Subject: Re: The truth about cat
Message-ID: <7387@alice.UUCP>
Date: Wed, 21-Oct-87 01:17:44 EDT
Article-I.D.: alice.7387
Posted: Wed Oct 21 01:17:44 1987
Date-Received: Fri, 23-Oct-87 01:24:28 EDT
Organization: AT&T Bell Laboratories, Murray Hill NJ
Lines: 15

Re CTSS:
Sorry for not spelling the acronym; as Bernie Cosell pointed out,
CTSS was "Compatible Time-Sharing System" at MIT, and ran on the
IBM 7090/94.  "Compatible" meant it had a batch mode that would run
FMS programs (FMS was Fortran Monitor System).  This was not used
much.

The 7090->7094 transition was not influenced by CTSS; the real
difference between the CTSS '90 or '94 and the commercial models was
the second core box (another 32K 36-bit words!) and a kludged-in
supervisor mode.  These were RPQs (sorry, another acronym:  "request
price quotation", i.e.  a special feature not ordinarily available.)
The stock 7094 was no more sharable than earlier models.

		Dennis Ritchie