No, not PDP-10, PDP-1. Thanks to Al Kossow, I already have the manual for MACRO, but he didn't scan the source listings (which are supposed to come with the manual) and I haven't found anyone else who has a copy. Any other listings (DDT, TECO, MIDAS, the LOGO programming language, TVEDIT or any of the timesharing systems) would be interesting too. I'm trying to spiff up the cross assembler that comes with Bob Supnik's simulator, so that's why MACRO and MIDAS are important. I'm also trying to understand Peter Deutsch's LISP, so that's why DDT is important. The others would be just for fun. I already have Spacewar from http://lcs.www.media.mit.edu/groups/el/projects/spacewar/sources/ but maybe someone has a newer version. Thanks, -- Derek