EISA is a standard bus (computer
interconnection) architecture that
extends the ISA standard to a 32-bit
interface.
It was developed in part as an open
alternative to the proprietary Micro
Channel Architecture (MCA) that IBM
introduced in its PS/2 computers.
EISA data transfer can reach a peak
of 33 megabytes per second.
http://www.justvb.net/it/