I can cite a third edition that existed inside Bell Labs at one point: white covers, with the latter-day AT&T Bell Laboratories name and deathstar logo; AT&T BELL LABORATORIES PROPRIETARY (RESTRICTED) printed across the bottom of every page. The title page also says Use pursuant to G.E.I. 2.2. Instead of `this document may contain information covered by one or more licenses,' there is a paragraph declaring that `This document is restricted to authorized AT&T employees who have a job-related need to know, and holders of a license for the UNIX* Operating System, Level Six, from AT&T Technologies, Inc., subject to the restrictions stated in such license.' And of course the footnote credits the trademark to AT&T Bell Laboratories. The use of the deathstar and the modern company name suggest these were printed post-divestiture, i.e. no earlier than 1984. Andrew Hume came across a few copies of this edition sametime in the late 1980s. I think they came from a load of stuff about to be thrown out by Judy Macor, who used to be the person who handled license paperwork and sent out tapes. For some reason my copy has a paper clip on the page where `You are not expected to understand this' appears. Norman Wilson Toronto ON