"The Best of Both Worlds". The EISA (Extended ISA) was developed by
the "gang of nine", a group of large computer companies interested in developing
an open technology that was better than the ISA bus. The EISA bus combined
many of the original features of the MCA expansion slot, while leaving
it compatible with the original ISA configuration. EISA buses were generally
used in servers; however, the PCI bus is now quickly replacing them. You
can identify an EISA bus by its similarity to an ISA bus.