Industry Standard Architecture is the 16-bit internal bus of IBM PC/AT and similar computers based on the Intel 80286 and its immediate successors during the 1980s. The bus was backward compatible wit
One 8-bit and five 16-bit ISA slots on a motherboard
8-bit XT, 16-bit ISA, EISA (top to bottom)
8-bit XT: Adlib FM Sound card
16-bit ISA: Madge 4/16 Mbps Token Ring NIC
Micro Channel architecture, or the Micro Channel bus, is a proprietary 16- or 32-bit parallel computer bus publicly introduced by IBM in 1987, which was used on PS/2 and other computers until the mid-
IBM XGA-2 32-bit graphics card
Two 16-bit MCA slots (top and middle). At the bottom is an MCA slot for an IBM 8514 card.
CHIPS P82C612 in a PLCC package
IBM 83X9648 16-bit network interface card