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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.arch
Subject: Re: time-sharing history, Privilege Levels Below User
Date: Wed, 12 Jun 2024 02:47:48 -0000 (UTC)
Organization: A noiseless patient Spider
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On Tue, 11 Jun 2024 09:37:32 -0000 (UTC), John Levine wrote:

> According to Lawrence D'Oliveiro  <ldo@nz.invalid>:
>
>>> I'm quite sure that IBM would disagree with this statement.
>>
>>I’m sure they would. But they invented virtualization in CP/CMS because
>>their attempt at an “interactive timesharing” system, CMS, was only
>>single-user.
> 
> There's no need to make up silly stories like this ...

No need to take my word for it. Bitsavers added issues of a magazine 
called “Mainframe” a few months back. I took the trouble to read the first 
one--it’s all about IBM, as though other “mainframe” machines didn’t 
exist. There’s a description of the background to CP/CMS (later VM/CMS) 
there.