Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!linus!decvax!harpo!seismo!hao!hplabs!sri-unix!gwyn%brl-vld@BRL-VLD.ARPA
From: gwyn%brl-vld@BRL-VLD.ARPA
Newsgroups: net.unix
Subject: Re:  UNIX History
Message-ID: <15460@sri-arpa.UUCP>
Date: Fri, 13-Jan-84 21:39:34 EST
Article-I.D.: sri-arpa.15460
Posted: Fri Jan 13 21:39:34 1984
Date-Received: Mon, 16-Jan-84 01:25:49 EST
Lines: 5

From:      Doug Gwyn (VLD/VMB) <gwyn%brl-vld@BRL-VLD.ARPA>

The UNIX System V IPC was already present in USG UNIX 4.1.
(Not related to 4.1BSD.)
It appears to me that these features must have been in UNIX/RT.