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From: Michael S <already5chosen@yahoo.com>
Newsgroups: comp.arch
Subject: Re: architecture, The Design of Design
Date: Tue, 7 May 2024 11:54:33 +0300
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On Mon, 06 May 2024 18:22:59 -0700
Tim Rentsch <tr.17687@z991.linuxsc.com> wrote:

> 
> I don't buy it.  An architecture is just a description of system
> behavior, and surely there were descriptions of system behavior
> before System/360.  Even in the 1950s companies must have changed
> implementations of a given model while still conforming to its
> earlier description.

Were they?
My impression is that until S/360 there was no such thing as different
by 100% SW compatible models.