EISA

from The Free On-line Dictionary of Computing (8 July 2008)

Extended Industry-Standard Architecture
EISA

   <architecture, standard> (EISA) /eesa/ A {bus} standard for
   {IBM compatibles} that extends the {ISA} bus architecture to
   32 bits and allows more than one {CPU} to share the bus.  The
   {bus mastering} support is also enhanced to provide access to
   4 GB of memory.  Unlike {MCA}, EISA can accept older {XT bus
   architecture} and {ISA} boards.

   EISA was announced in late 1988 by compatible vendors as a
   counter to {IBM}'s MCA in its {PS/2} series.  Although
   somewhat inferior to the MCA it became much more popular due
   to the proprietary nature of MCA.

   [Main sponsors?  Open standard?]

   (1996-06-25)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

EISA
       Enhanced Industry Standard Architecture (ISA)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

EISA
       European Imaging and Sound Association (org., Europe)