In a multicomputer system the computational load amid different processors should be balanced. To pass information between different nodes message passing technique is used. The programming environment of a multicomputer comprises a host runtime system and resident operating system known as Kernel in all node computers. The host system offers uniform communication amid processes with no intervention of nodes, network connection and host workstation. Host processes are located outsides the nodes. The host environment for hypercube computer at Caltech is UNIX processor and employs UNIX in addition to language processor utilities to correspond with node processes. The Kernel is independently located in every node computer which supports multiprogramming with an address space confined by local memory. Numerous node processes can be created at every node. All node processes execute simultaneously in various physical nodes or interleaved by multiprogramming within same node. Node processes communicate with one another by transmitting or receiving messages.