HP 2100A stuff - info needed

With all of the commotion on pdp8-lovers concerning old HP stuff in Michigan, I decided to take a look at what I have. I have no software or paper with my "pile" (no rack, that was kept by the previous owner), so I am basically stupid about the thing. Maybe someone can help. 2100A Computer #1304A02190 "Option 008" 7900A Disk Drive #1527A04334 2895B Tape Punch #1632A03303 FACIT model 4070 2748A Tape Reader #1133A01747 "System Serial 0815F" 13215A Disk Drive Power Supply #1435A04338 "Option STD" ????? Line Printer #? (Way too buried to investigate) Inside the 2100A are cards: row 1: row 2: A1 thru XYD A9 SSA TERM SSA LINE PRINTER XYD GRD TRUE IN/OUT ID (16K) +8 BIT DUP REG IDL +8 BIT DUP REG DC DISC INT'F 2 XYD DISC INT'F 1 SSA CRT INTERFACE SSA JUMPER (5 of them) XYD TIME BASE GEN (with a Hallicrafters property sticker) The processor boards date to 1972, yet others date to the early 1980s. Apparently this thing was upgraded (or repaired) several times during its life doing secret things. OK, what do I have? Any input would be helpful. William Donzelli william(a)ans.net