On Wed, Jan 22, 2020 at 2:42 PM Warner Losh wrote: > > Berkeley's license was executed in January 74, so it might be on the list, > unless there was a big delay. > That makes sense. > In addition to the Nov 1975 CACM paper, there's CAC 155, published by the > University of Illinois on 3/15/75 which pre-dates the 6th edition by a few > months. You can read it here > https://www.ideals.illinois.edu/bitstream/handle/2142/32547/networkunixsyste155holm.pdf?sequence=2&isAllowed=y if > you'd like. > Thanks, that tells us it was 5th (BTW the PDF is missing page 1 in the scan - although I suspect the missing info can be gleaned from RFC 681) BTW: There is another hint in CAC 155/RFC 681. The line on page 2 that reads: "since the user is allowed only sixteen open files." My memory is V6 allowed more than 16, over 20 is my memory; but we would have to look at the structure to see what it is defined as. > > RFC 681, dated March 18th, 1975, is another instance of an edited CAC 155 > report (it seems, I've not looked at them exactly, just a quick glance) > that talks about this work. It's the earliest mention of Unix in an RFC > (the next one isn't until 2 years later for an email address for Dave > Crocker DCrocker@Rand-Unix in RFC 724 in May 1977 after which it explodes > in references). > And that pretty much syncs with my memory of the time.