The last several years saw an emergence of standardization activities for real-time systems including standardization of operating systems series of POSIX standards 1 , of communication for distributed POSIX.21 15 and parallel systems MPI RT 6 and real-time object management real-time CORBA 14 . This article describes the ongoing work of real-time message passing interface MPI RT standardization. MPI RT advances the Message Passing Interface Standard MPI,emphasizingchanges that enable andsupport real-time communication, and is targeted for embedded, fault-tolerant and other real-time systems.