I am culling thru some IBM docs, and came across a boring printer memo (for the 3203, all about print quality, big deal) bound in an interesting binder. It is a standard 1950s brown Accopress binder, but the tag on the front says "FRAME 41, XD-1 MAINTENANCE SUPPORT, GROUP 201-250". This cam from a gut that gave RCS a big pile of IBM docs (he was an FE) in the Boston area. XD-1 as in AN/FSQ-7(XD-1)? Mike? -- Will