Connectors on the rear panel include an ADB port for keyboard and mouse, two mini-DIN-8 RS-422 serial ports, DB-25 SCSI, DB-19 External floppy drive, and two 3.5 mm minijack audio sockets for audio in and headphone out. The Classic II has a 50-pin internal expansion slot intended for either an FPU co-processor or additional ROM. Due to not being designed to be used for any other purpose, the socket is unsuitable for use as a general expansion slot. Apple never produced an expansion card of any kind for this slot, although at least one third-party FPU was available: the FastMath Classic II by Applied Engineering. and Sonnet offered a synchronous (16 MHz) and asynchronous (50 MHz) 68882 FPU. Gallery Timelines References External links Classic II (Performa 200)Information pages at Mac512.com Classic II Classic II Classic II Computer-related introductions in 1991