Micro Channel architecture

Micro Channel

Micro Channel architecture
IBM XGA-2 32-bit graphics card
Year created	1987; 37 years ago (1987)
Created by	IBM
Supersedes	ISA
Superseded by	PCI (1993)
Width in bits	16 or 32
Speed	10 MHz
Style	Parallel
Hotplugging interface	No
External interface	No

Micro Channel architecture, or the Micro Channel bus, is a proprietary 16- or 32-bit parallel computer bus introduced by IBM in 1987 which was used on PS/2 and other computers until the mid-1990s. Its name is commonly abbreviated as "MCA", although not by IBM. In IBM products, it superseded the ISA bus and was itself subsequently superseded by the PCI bus architecture.