grt@twitch.UUCP ( G.R.Tomasevich) (06/18/86)
> 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