In the early 1980s, as DEC started to de-commit to the 36-bit line after they introduced the 32-bit Vax systems, a number of PDP-10 clones appeared on the market. For instance, the System Concepts SC-40 was what Comp-U-Serve primarily switched to. Similarly, many ex-Stanford AI types forked to create the Toad Systems XXL, a KL10 clone. SDF and LCM+L owned several of these two styles of systems and were on display and available for login. Since Twenex.org is live (and has been) and Stephen shows a picture of the SC40, again, I am (again) >>guessing<< that these have all been moved to the new location for SDF.
There was also Foonly, founded by one of the researcher's on SAIL's DARPA-funded Super Foonly project to build a faster successor to DEC's PDP-10 KA10 processor. When DARPA cut the funding, many of the engineers on Super Foonly went to DEC and helped design the KL-10 PDP-10 processor. Dave Poole founded Foonly Inc. Their first machine, the F1, was a 4.5 MIPS PDP-10 implementation, but only one was ever built. Foonly survived for a while making cheap PDP-10 clones, but it was done in when DEC cancelled the Jupiter project, thus effectively ending the life of the PDP-10 line of processors.
-Paul W.