To all who replied.... many thanks. One of them had a 16K memory Module (so I guess it's an 85A) and a ROM drawer with an I/O ROM and a Mass Storage ROM and a HP-IB Interface. I took a chance after some initial cleaning and powered one up. It worked! But the keyboard has terrible bounce! It appeared that the printer wanted to print but without paper in it, I don't know if it does. I plan to disassemble it for a more thorough cleaning, including removing all the keycaps and cleaning out the innards of the family of dust bunnies living there. More weekend cleaning chores! I will order the CDROM with the manuals - that's the easiest way to get docs. Are new tapes still available? Bob Stek Saver of Lost Sols