Source : Free On-Line Dictionary of Computing

Message Passing Interface
     
         A {de facto standard} for
        communication among the {nodes} running a {parallel program}
        on a {distributed memory system}.  MPI is a {library} of
        {routines} that can be called from {Fortran} and{ C} programs.
        MPI's advantage over older message passing libraries is that
        it is both {portable} (because MPI has been implemented for
        almost every distributed memory {architecture}) and fast
        (because each implementation is {optimised} for the {hardware}
        it runs on).
     
        [Address?]
     
        (1997-06-09)