CP/M existed before IBM PC/DOS which existed before MS/DOS although the
latter two are essentially the same. CP/M was also available for the
IBM PC on the day of announcement but the cost was $250 vs about $60 for
PC/DOS. Not hard to guess which one survived.
Chuck Norcutt
Chris Barker wrote:
> It was CP/M, Frank; I had to search for it on the Web. It was a
> command-line system with commands similar to MSDOS.
>
> Chris
>
> On 19 Dec 2008, at 10:28, Frank van Lindert wrote:
>
>> Dr DOS? Concurrent DOS? QDOS (Quick and Dirty DOS? 86-DOS?
>>
>> BTWQ, it might interest you that one of the first disk operating
>> systems was mad by... Apple. At least according to this link
>> http://members.fortunecity.com/pcmuseum/dos.htm , FWIW.
>>
>> Frank van Lindert
>> Utrecht NL.
>>
>>
>>
>> Fri, 19 Dec 2008 09:46:47 +0000, Chris Barker <ftog@xxxxxxxxxxxxxx>
>> wrote:
>>
>>> Winchester drives! It was a machine with a 20Mb Winchester on
>>> which I
>>> learned about personal computing. It was connected (in 1986/7) to a
>>> computer running an OS whose name now escapes me: a DOS but not PC
>>> DOS
>>> or MSDOS.
>
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