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From: grt@twitch.UUCP ( G.R.Tomasevich)
Newsgroups: net.unix,net.unix-wizards
Subject: Re: AT&T UNIX History
Message-ID: <375@twitch.UUCP>
Date: Wed, 18-Jun-86 09:09:52 EDT
Article-I.D.: twitch.375
Posted: Wed Jun 18 09:09:52 1986
Date-Received: Fri, 20-Jun-86 01:15:30 EDT
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Organization: AT&T Bell Labs, Holmdel
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> 1, 2, and 4. USG System 4 did not have enough functionality
> beyond that available in USG System 3/III to justify a
> separate external release.
> 					Adam Reed

It also apparently was not maintained consistently over processors.  We had
4.2 (not to be confused with 4.2BSD) on both a VAX-11/750 and PDP-11/45.
The VAX version of the C compiler was closer to the 5.0 in strictness of error
messages, such as using += in place of =+, and in conversions between pointers
and other types, while the PDP version seemed identical, or nearly so, to the
3.? version.  Because of that, lots of programs broke when I ported them.
-- 
	George Tomasevich, ihnp4!twitch!grt
	AT&T Bell Laboratories, Holmdel, NJ