Jerome Fine replies: I missed the original post. Sky made a co-processor called a SKYMNK about 15 years ago for the Qbus consisting of two quad Qbus boards, but I never knew the numbers. These boards were able to do complex calculations such as an FFT using both on board memory as well as the memory of the Qbus. In general, the SKYMNK was designed to be used in a PDP-11 environment. On the other hand, in thinking about the products that Sky made, I also seem to remember a "Warrior" product. From the board names, it seems more likely that "Skywar" stands for that product and the "Q" is for the Qbus. "A/B" would seem to be a two board set and "03" a revision number. Total speculation on my part in this paragraph. Sincerely yours, Jerome Fine