Yes; I don't know exactly when the first one arrived, but I'm pretty sure it was around the end of my freshman year (i.e. the summmer of '75), because I remember a friend showing me Unix sometime in my sophmore year, and they already had it as a going concern then. The first one (I think) at MIT was the 11/70 belonging to the Domain-Specific Systems Research group at LCS (DSSR). I got a copy of theirs for the Computer Systems Research group (CSR) at LCS, that would have been in the fall of '77. I don't think the AI Lab ever had one; with us all together in 545 Tech Sq I think I would have heard (although maybe the Turtle guys on the third floor had one). There were probably others on campus, but Unixes could be pretty small, and MIT is big enough that the left hand wouldn't know of the right (and 545 Tech Sq was kind of insulated from the rest of campus anyway). One I recollect on main campus later on was somewhere in the EE department - maybe Speech? They had the CHAOS protocols installed on it - that was later, say '79-'80 or so. Not to mention things like the ACM paper, which was public domain... non-disclosure agreements. That sounds likely. Well, I don't know about the license (MIT had a student who was an intern at Bell, and I think a lot of stuff slipped out the back door with him :-), but MIT definitely had V6 in 1976 or so, and V7 wasn't released until 1979. So we had it long before V7. Plus to which I have listings of the kernel; it's definitely pre-V7, but it's not vanilla V6, it has some other stuff in it (I think it's probably PWB). Noel