The Canon Cat was designed by Jef Raskin, who in 1979 initiated the original Macintosh computer project while working at Apple (Raskin was Apple employee #31). The Macintosh, so-named by Raskin, was to be an inexpensive, text-based, keyboard-controlled system meant for the average "person in the street" (PITS). After Steve Jobs took over the project while still in its infancy, Raskin left Apple to start his own company, Information Appliance, Inc., where he was free to develop his ideas without external influence. Continuing his "user interface" (UI) concepts, he developed the SWYFT, a prototype system which eventually evolved into the Cat, after Canon bought and financed the development. This computer is a rare and working Swyft prototype for the Canon Cat. It is in excellent condition the disk drive works well. The label on the back indicates, it's Model #S0001 and "Prototype model. No UL approval. No FCC approval." I received it from Sandy Bumgarner, who was a Programmer at Jef Raskin's Information Appliance. The built-in ROM contains all of the software and it Kb of RAM available for text. The unit has no on/off switch by design and starts up on plugging into mains power. The built-in software also contains the Forth development language of this Swyft and the Canon Cat. A simple command exits the Forth language and transfers control back to Edde, the editor software.