Moved to the COFF list. I agree WAITS gets very little attention, particularly in relation to the great number of things pioneered at SAIL. I'm involved making emulators for some of the hardware. SAIL started out with a couple PDP-1 timesharing systems with vector displays from Philco. But that's almost a pre historical era. The PDP-6/10 started with another vector system from III. It could support up to 12 displays, but only ever had 6. A raster display system was added in the early 70s. It must have been one of the very first bitmapped display systems. It came from the Data Disc company and used disk for storage. It was dual ported: the computer could write data, and the displays could read. 64 displays were supported. The III and DD displays used the SAIL keyboard which introduced the META key. The Data Disc displays and SAIL keyboard heavily influenced Tom Knight at MIT to make a similar system for their AI lab PDP-10 running ITS.