ACSI (Atari Computer System Interface) is a SCSI-derived bus on the Atari ST using a DB19 connector for hard drives, CD-
RS-530 is a high-speed serial interface using a DB25 connector for synchronous serial WAN connections at up to 2 Mbps, u
X.21 is an ITU-T serial interface for digital WAN connections using a DB15 connector. Used in European digital leased li
NEC PC-98 is the Japanese PC standard with a proprietary C-Bus expansion connector, used in NEC PC-9801 and PC-9821 comp
V.35 is a serial WAN interface for connecting routers to DSU/CSU equipment using a square 34-pin Winchester M/34 connect
RS-422 uses balanced differential signals on a 9-pin D-sub for longer distance serial communication than RS-232, support
VESA Local Bus (VL-Bus) is a 32-bit extension of the ISA bus running at CPU speed (25-40 MHz) for video cards in 486-era
EISA (Extended ISA) extends ISA to 32-bit by adding a second row of contacts in the same slot, backwards compatible with
MCA (Micro Channel Architecture) is IBM proprietary bus for PS/2 computers from 1987, with 32-bit data and address bus,
Zorro II is the Amiga 2000 expansion bus providing a 16-bit data bus at 7.14 MHz based on the 68000 processor bus for me
NuBus is the expansion bus used in Mac II, IIx, IIcx, IIci, Quadra, and some PowerMac models from 1987 to 1995. The 96-p
13W3 is a hybrid D-sub connector with 10 standard signal pins plus 3 coaxial contacts used for RGB video on Sun workstat
ISA 16-bit slot extends the 8-bit ISA with an additional 36-pin connector section for 16-bit data bus and 24-bit address
ISA (Industry Standard Architecture) 8-bit expansion slot used in IBM PC and XT clones from 1981, providing an 8-bit dat
C64 User Port is a 24-pin edge connector providing 8 bits of parallel I/O, RS-232 serial, and timing signals for modems,
The Commodore Amiga DB23 video connector outputs analog RGB, composite sync, and audio signals from Amiga 500, 1000, 200
C64 cartridge expansion port is a 44-pin edge connector providing the 6510 processor address and data buses, control sig
PS/2 Mini-DIN 6-pin connectors are used for PS/2 keyboards (purple) and PS/2 mice (green) on IBM PC compatible computers
Centronics 36-pin connector is the original parallel printer port interface on printers from the 1970s through 2000s. Th
Apple used a DB25 D-sub connector for external SCSI on Mac Plus, SE, II, and early Power Macs instead of the Centronics
Apple Desktop Bus (ADB) is a daisy-chainable serial bus used by Apple computers from 1986 to 1999 for keyboards, mice, t
The DA-15 game port (joystick port) is a 15-pin D-sub connector on PC sound cards and motherboards from the 1980s to ear
DE-9 (commonly called DB9) is the 9-pin D-sub connector for RS-232 serial communication used from the 1980s through toda