List of computer bus interfaces

This is a partial list of expansion bus interfaces, or expansion card slots, for installation of expansion cards.

Bus interfaces

Interface name	Year introduced	Connector	Max transfer	Main use	Notes
CAMAC	1972			Processor independent	Industry use.
S-100	1974	2×50 2.54 mm card edge		Designed around Intel 8080 but used with other processors too	Homebrew and industry use.
VME	1981	DIN 41612	10 MByte/s	Motorola 68000 based	Industry use.
STEbus	1983	DIN 41612 a+c rows	?	Processor independent based	Industrial quality bus, 8-bit data / 20-bit address. Eurocard sized.
Acorn system bus	1979	DIN 41612 a+b rows	?	6502 based	8-bit data / 16-bit address.
ISA-8	1981[1]	2×31 2.54 mm	1.99 MByte/s[2]	IBM PC	Widespread.
ISA-16	1984[3]	2×31 + 2×18 2.54 mm	3.97 MByte/s[4]	IBM AT	Widespread.
Amiga Zorro II	1985[5]	2×50 2.54 mm card edge	3.56 MByte/s	Amiga	Auto configuration.
Micro Channel	1987[6]	edge card	40 MByte/s	IBM PS/2	32-bit and 16-bit versions
EISA	1988[7]	edge card	20 MByte/s	IBM clones	32-bit version of ISA-16 more or less.
NuBus	1987	DIN 41612	40 MByte/s	NeXT, Macintosh II
Amiga Zorro III	1990[8]	2×50 2.54 mm card edge	150 MByte/s	Amiga	Multiplexed 32-bit.
PDS	1990	DIN 41612		Macintosh LC
PCI-32/33	1993[9]	card edge	133 MByte/s		Widespread.
PCI Express	2004[10]	card edge	250 MByte/s		P2P highspeed PCI.
VPX	2004[11]	MultiGig RT2[12]	?	Provides VMEbus-based systems with support for switched fabrics. Designed specifically with defense applications in mind. Working group is OpenVPX.	VPX computer bus standard - V -VME and P -PCI and X the extents for both buses standards.
VXI	1987[13]		160 MByte/s[14]	Multivendor standard for automated testing expansion cards. Working group is VXIConsortium.

• Bus interfaces
• 
  ISA
• 
  EISA
• 
  NuBus
• 
  PCI
• 
  PCI Express ×16 slot
• 
  PCI Express ×1 slot

See also

• List of interface bit rates