From: utzoo!decvax!cca!hplabs!hao!menlo70!sytek!gi!arizona!kpno!stevens@sri-unix
Newsgroups: net.unix-wizards
Title: What are UNIX Versions 4 & 5 ?
Article-I.D.: kpno.121
Posted: Thu Nov 18 16:22:28 1982
Received: Sat Nov 20 10:44:15 1982

Since we are not part of the Bell System I have a question for any
Bell/AT&T employee out there in net land.  There have been many references
of late to versions 4 and 5 of UNIX*.  The last BSTJ contained an
article that referenced version 4.0.  Now I see references to 5.0 too.
>From what I understand, versions 6 and 7 were actually 1.6 and 1.7;
version 2 never made it out the door to sites other than Bell;
version 3.0 is now being sold by AT&T (System III).

What are versions 4 & 5 ?  What has changed from V7 and System III ?
I hear rumors of inter-process communications and real-time ?
Has Bell finished using version 3 in-house ?

Please mail me directly, rather than multiple answers to the net.
I'll summarize if there is interest.

	Richard Stevens
	Kitt Peak National Observatory
	...ucbvax!arizona!kpno!stevens