EISA
Short for Extended Industry Standard Architecture, EISA, also known as Extended ISA, is a standard first announced in September of 1988 for IBM and IBM compatible computers to compete with the IBM MCA bus. The EISA bus is found on Intel 80386, 80486 and early Pentium computers and was designed by nine competitors to compete with IBM's MCA bus. These competitors were AST Research, Compaq, Epson, Hewlett Packard, NEC, Olivetti, Tandy, WYSE, and Zenith Data Systems.
The EISA bus provided 32-bit slots at an 8.33 MHz cycle rate for the use with 386DX or higher processors. In addition, the EISA can accommodate a 16-bit ISA card in the first row.
Although the EISA bus is backwards compatible and not a proprietary bus it never became widely used and is no longer found in computers today.
Also see: Bus, ISA, MCA, Motherboard definitions
