Hi, I seem to remember that I have a copy of the UCSD p-System for a PC. I also have a z-80 cross-assembler for that environment. I'll have a look in the storage room tonight and see if I can find the media. From memory, it was distributed on 5.25", 360K floppies. What are the re-distribution rules? I believe that UCSD still exists, so it is probably not abandonware. Regards Doug Jackson