I was checking the Polymorphic Systems computers I have against the "The Big List" and found an 8824. It is a partial chassis but looks similar to the others except it is designed for 8" drives. Since it is not complete, I'll have to check in the Engineering stuff to see if there is a description of it. I also found a chassis model 88DS. It doesn't match with the number in "The Big List" so I'll check further into that. Regarding the others, from the "System 88 User's Manual", copyright 1979. 1.1 SYSTEM 88 MODELS The System 88 product line consists of the System 8813, available with up to 3 mini-floppy drives; the System 8810 with one mini-floppy drive, and the 88/MS add-on with 2 large floppy drives. The 8813 and 8810 models are available with optional double-sided, double density, mini-floppy disk drives. The 88/MS, an add-on storage for the 8813, is available with either double or single-sided, double density large floppy disk drives.