A variety of memory (RAM) types have been used.
IBM provides instructions for memory removal and installation.
For more information on RAM, have a look at the WikiPedia RAM article
- IC DRAM Card Non-Parity
- IC DRAM Card Parity
JEDEC 72-pin SO-DIMM
- 70ns Non-Parity
- 70ns Parity
JEDEC 144-pin EDO SO-DIMM