Subject: Re: dsw

From: [email-masked]
Date: Mon, 30 Aug 1999 02:07:15 -0400

I looked at the slides--look OK to me.  I was strongly tempted to
come to the event, but September is a bad month w.r.t. work things.

About the specific slide you sent--if you want to be certain
of correctness in all details, you might just say 1973 instead of 1972.
>From 1999's viewpoint, it's equally impressive, but  several things are better
documented historically for '73 than '72-- things were changing
fast.  The later things (not in from the start, but indeed in by 1973) were
OS written in C, pipes, approximately the current form of signals.

Incidentally, some features mentioned that were in from
absolutely the very start (the magic 30 years) were

	multiple concurrent and named users (passwords later)

	multiple processes (not protected, because the hardware
	  didn't have it) with swapping

	sort of hierarchical file system
	permissions
	hard links
	devices accessed as files

	open close read write seek operations on files

Things certainly added '71-'73-- C, pipes, passwords,
approximately modern form of signals.

	Dennis