E xtended I ndustry S tandard A rchitecture. An Extension to the ISA standard having extra address databus connectors - Compatible with the earlier ISA architecture. Introduced in 1988 by a group of nine major companies in the PC industry being :-
AST Research
Compaq
Epson
Hewlett Packard
NEC
Olivetti
Tandy
Wyse
Zenith