Mark Crispin wrote that the Foonly F4 became Tymshare's 26XL

[ambiamber]

8 Nov 1999 ...he built the F4 which subsequently became Tymshare's 26XL

[larsbrinkhoff]

Thanks! Here's a brochure. The 26KL was also called the Augment Engine. I suppose it ran or was intended to run Augment, i.e. Engelbart's NLS!

http://bitsavers.org/pdf/sri/arc/augment_engine/26KL_Brochure_Oct83.pdf

[larsbrinkhoff]

Here's the wiki page: https://github.com/PDP-10/foonly/wiki/System-26KL

There was a Tymeshare machine called System 26 or System XXVI. Then it was moved more towards the KL10 and called 26KL.

There was also something called Foonly F4B which may or may not have had a connection to the 26KL.