Abstract: A system and method for communicating data between two nodes defines a plurality of separate partitions on each node and assigns one or more subjects to at least one of the plurality of the separate partitions. The subjects in each node communicate data with each other over one or more channels. For communicating the data, the present invention separates data communications on a channel from that of other channels. More specifically, each node runs under the control of a separation kernel (SK) that partitions the nodes to define the subjects according to an SK configuration data. A partitioning communication system (PCS) separates the communications channels according to a PCS configuration data.