What military contractor, primarily for DARPA, designed the The Pluribus? 
Pluribus: The Pluribus multiprocessor was an early multi-processor computer designed by BBN for use as a packet switch in the ARPANET. BBN Technologies: BBN Technologies (originally Bolt, Beranek and Newman) is an American high-technology company which provides research and development services. BBN Technologies:  It is a military contractor, primarily for DARPA, and also known for its 1978 acoustical analysis for the House Select Committee on the assassination of John F. Kennedy.
BBN Technologies