12531C		Buffered Teleprinter Interface Kit
12539A		Time Base Generator Interface Kit
12557A		Cartridge Disc Interface Kit
12559A		9-Track Magnetic Tape Unit Interface Kit
12565A		Disc Interface Kit		(2883A 2884A 2885A discs)
12566B		Microcircuit Interface Kits
12584A		Teleprinter Multiplexor Computer Interface Kits
12597A-002	Tape Reader Interface Kit
12597A-005	Tape Punch Interface Kit
12606B		Disc Memory Interface Kit	(2770A 2771A discs)
12610B		Drum Memory Interface Kit	(2773A 2774A 2775A drums)
12875A		Processor Interconnect Kit
12895A		Direct Memory Access Computer Accessory Kit
12901A		Floating-Point Hardware Accessory Kit (For 2100 Computer)
12907A		Fast Fortran Processsor Hardware Accessory Kit (For 2100 Computers)
12908A		Writable Control Store Interface Kit (For 2100 Computer)
12920A		Asynchronous Multiplexer Interface Kits (For 2100 Series Computers)
12924A          Card Reader Interface
12925A		Paper Tape Reader Subsystem
12926A		Paper Tape Punch Subsystem
12930A		2100 Universal Interface Board
12936A		Privileged Interrupt Fence Accessory (For 2100 Computers)
13181A		Digital Magnetic Tape Unit Interface Kit (For 2100 Series Computers)
13181B		Digital Magnetic Tape Unit Interface Kit (For 21MX Series Computers)
13206A		2000/ACCESS Communications Processor Firmware Kit (for HP 2100 Series Computer)