Files 3C389A.EXE through 3C389F.EXE are installation Diskettes #1 to 6 for the 3Com 3C389 16/4 Token Ring LAN PC Card. This adapter is in the IBM OBI CTO Portfolio and is assigned IBM Part numbers. 3 COM P/N 3C389 = IBM P/N 00N9593 with IBM FRU P/N 00N9595.