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From: jedelen@slate.mines.colorado.edu (Jeff Edelen)
Newsgroups: comp.sys.ibm.pc,comp.os.msdos.programmer,comp.sys.ibm.pc.misc
Subject: Re: Who the hell wrote CP/M?
Message-ID: <1991Mar28.053026.27936@slate.mines.colorado.edu>
Date: 28 Mar 91 05:30:26 GMT
References: <27478@uflorida.cis.ufl.EDU> <94uwy2w163w@shark.cs.fau.edu>
Organization: Colorado School of Mines
Lines: 22

In article <94uwy2w163w@shark.cs.fau.edu> rob.bbs@shark.cs.fau.edu (Robert Rittenhouse) writes:
>jdb@reef.cis.ufl.edu (Brian K. W. Hook) writes:
>
>> A friend and I got in a massive argument over who wrote the CP/M operating
>> system.  He claimed that it was "DEC" but I stated that it was DRI.  I
>> assumed all along that:
>> 
>> 1.  CP/M was written by Gary Kildall.
>> 2.  CP/M was written by DRI
>> 3.  DRI is NOT related to DEC (Digital Equipment Corporation)
>> 
>> If I am in err, pleae let me know.
>> 
>You are correct. Gary Killdall, (Intergalactic) Digital Research Inc.
>CP/M was loosely based on a DEC PDP-11 OS (I think RSTS) tho.
>Rob R.
>> Brian

I always thought it was based on TOPS.  I've never used TOPS, but I have used
RSTS, and can't believe it's based on that.

--jeff