HP 28650-69102 - HP-IB interface board - HP-IB Interface Board - for the HP-PB I/O Board Slot(28650B) Retail
HP 28615-69004 - Fiberoptic peripheral interface board - Fiberoptic Peripheral Interface Board - for the HP-PB I/O Board Slot (P/O 28615A or 28616A) Retail
HP 30243-69001 - LANIC board - LAN network interface board - LANIC Board - LAN Network Interface Board - Goes in Slot 3 of the CPU Unit (as an Option Board) Retail
HP 5061-4943 - Data link slave interface board - Single channel - Data Link Slave Interface Board - Single Channel (12072A) Retail
