From mboxrd@z Thu Jan  1 00:00:00 1970
From: doug@cs.dartmouth.edu (Doug McIlroy)
Date: Tue, 12 Sep 2017 07:18:52 -0400
Subject: [TUHS] File-as-record
Message-ID: <201709121118.v8CBIqwn029754@coolidge.cs.Dartmouth.EDU>

> On the programming side, there wasn't either the memory capacity or
> processing power to implement a modern disk file system.  One of the
> first computers I worked with was a System/360 model 25 running
> DOS/360.  The machine had 48K of core memory, 12K of which was for the
> OS, leaving 36K for programs.  No virtual memory.

Unix was a counterexample. Recall that v1 worked on a 24K
machine, 16K of which was OS and 8K user. And it had a modern
file system. Programming was so much easier that it lured
people (e.g. me) away from big mainframe computers.

Doug