For those that don't know my page is at: http://www.aracnet.com/~healyzh/pdp10emu.html and Bob's pages are at: http://www.tiac.net/users/mps/retro/ I've got links to all the ITS related materials on the net that I'm aware of. If anyone knows of any documenation of any sort on the net besides what is at Mirian's site, or the ITS reference manual, version 1.5 from MIT, I'd appreciate knowing about it. The same goes for any other documenation for TOPS-10 and TOPS-20 that isn't already listed on my site. Zane