Re: time-sharing history, Privilege Levels Below User

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.