Well, there's your answer. They are all in the V6 library. Here's the source for setexit/reset: https://minnie.tuhs.org/cgi-bin/utree.pl?file=V6/usr/source/s5/reset.s You do realize that if you got it compiled under V7 and ran it, it would trash the disk, right? (The V6 and V7 filesystems are different; very similar, but block nubers are 16 bits on V6, ans 32 bits on V7.) No. No 'make' in V6. Which is why you find those 'run' shell files: https://minnie.tuhs.org/cgi-bin/utree.pl?file=V6/usr/source/s4/run everywhere. Which one? There were two: "MIT's AI Lab", by CSTACY, Alan Wecsler, and me; which Rob Austein re-wrote into "Alice's PDP-10". I thought the original was centered around ITS, but my memory was poor (hey, it has been ~40 years :-), it seems to sort of be about LISP Machines. Rob's version was about TWENEX (yech). The original was written in 926, MOON's office; I can't believe he put up with me hanging out there! So they're giving someone an oral exam. They can't make up their minds, or something, and they ask the person to step out for a second. When the person comes back in, they point to a Coke bottle sitting on a window-sill in the sunlight, and ask them to examine it. The person notices that it's warm on one side - the side facing the window. 'Why that side?', they ask. So the person goes into a long explanation about how the curved glass must have focused the light, yadda-yadda. WRONG! They turned it around while the person was out of the room. I think that the person fails their oral. I have no idea if it's a true story. Steve Ward told another oral story which I'm pretty sure _is_ true, though. They ask the candidate to design a state machine (or digital logic, I forget which) which can tell if a number is divisible by three (I think I have the details correct, but I'm not absolutely certain). So they describe one - and then point out that you can feed the number in from either end (most or least significant end first) - and proves that it will work either way! The committee was blown away. Noel