On 14 Aug 2007 at 10:33, John Foust wrote: So what were the differences between the 1977 version and the earlier ones? I'm certain the DECsystem 10 tape that I got from a DEC Field Engineer was probably in late 1975-or sometime during 1976--it definitely wasn't 1977 (I didn't have access to the equipment to read it then). It wouldn't surprise me if other copies eventually surfaced--it was widely pirated throughout the DEC culture. My only encounter with the code is having taken that tape and converted it to run on a CDC Cyber 74 using the FTN compiler. (Something that I'm surprised I wasn't fired for doing, given the number of CPU cycles that were subsequently burned playing the thing). Of course, I had the source code and database files, so I knew all of the gimmicks ahead of time. There's also a CP/M version from somewhat later running around, that I've got somewhere (not my work). Cheers, Chuck