[TUHS] File-as-record

Doug McIlroy doug at cs.dartmouth.edu
Tue Sep 12 21:18:52 AEST 2017

> 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.


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