Question: What military contractor, primarily for DARPA, designed the The Pluribus? 

Context paragraphs:
SIMSCRIPT II.5: SIMSCRIPT II.5 is the latest incarnation of SIMSCRIPT, one of the oldest computer simulation languages. Although military contractor CACI released it in 1971, it still enjoys wide use in large-scale military and air-traffic control simulations.

DARPA Network Challenge: The 2009 DARPA Network Challenge was a prize competition for exploring the roles the Internet and social networking play in the real-time communications, wide-area collaborations, and practical actions required to solve broad-scope, time-critical problems.  The competition was sponsored by the Defense Advanced Research Projects Agency (DARPA), a research organization of the United States Department of Defense.  The challenge was designed to help the military generate ideas for operating under a range of circumstances, such as natural disasters.  Congress authorized DARPA to award cash prizes to further DARPA's mission to sponsor revolutionary, high-payoff research that bridges the gap between fundamental discoveries and their use for national security.

Malhama Tactical: Malhama Tactical is a private military contractor operating in the Syrian Civil War.  The group, founded by a pseudonymous Uzbeki jihadist called Abu Rofiq, is closely allied with Jabhat Fateh al-Sham and its successor group Tahrir al-Sham.  Its six to ten members occasionally participate in combat and run guns, but primarily provide high-quality training.  The company is known to have worked with Ahrar al-Sham and the Turkistan Islamic Party.  Its leader Abu Rofiq was killed in an airstrike on February 7 2017.

Heavy Industries Taxila: Heavy Industries Taxila (Reporting name: HIT), is a major defence, military contractor, engineering conglomerate, and military corporation located in Taxila, Punjab, Pakistan.

Reality Winner: Reality Leigh Winner (born December 4, 1991) is a former American intelligence specialist, charged with "removing classified material from a government facility and mailing it to a news outlet."  The subject material originated from the National Security Agency (NSA).  On June 3, 2017, while employed by military contractor Pluribus International Corporation, Winner was arrested on suspicion of leaking an intelligence report about Russian interference in the 2016 United States elections to the news website "The Intercept".  The report suggested that Russian hackers attacked a U.S. voting software supplier.  Denied bond, Winner is being held at the Lincoln County Jail in Lincolnton, Georgia.

Abtan v. Blackwater: Atban v. Blackwater is a lawsuit brought by the victims and families affected by the September 16, 2007 Blackwater Baghdad shootings against Blackwater Worldwide, a private military contractor since renamed "Academi".  The case was consolidated with "Estate of Albazzaz, et al. v. Blackwater Lodge and Training Center, Inc. et al.", and the consolidated case was ultimately settled confidentially out of court.

BBN Technologies: BBN Technologies (originally Bolt, Beranek and Newman) is an American high-technology company which provides research and development services.  BBN is based next to Fresh Pond in Cambridge, Massachusetts, USA.  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 of the 1950s and 1960s has been referred to by two of its alumni as the "third university" of Cambridge, after MIT and Harvard.  In 1966, the Franklin Institute awarded the firm the Frank P. Brown Medal.

DARPA Grand Challenge: The DARPA Grand Challenge is a prize competition for American autonomous vehicles, funded by the Defense Advanced Research Projects Agency, the most prominent research organization of the United States Department of Defense.  Congress has authorized DARPA to award cash prizes to further DARPA's mission to sponsor revolutionary, high-payoff research that bridges the gap between fundamental discoveries and military use.  The initial DARPA Grand Challenge was created to spur the development of technologies needed to create the first fully autonomous ground vehicles capable of completing a substantial off-road course within a limited time.  The third event, the DARPA Urban Challenge extended the initial Challenge to autonomous operation in a mock urban environment.  The most recent Challenge, the 2012 DARPA Robotics Challenge, focused on autonomous emergency-maintenance robots.

ZYPAD: The ZYPAD is a PDA designed to be worn on a user's wrist like a bracer and offers interface port features similar to laptop computer.  It was developed by Parvus, a military contractor, and Eurotech.  It is arguable whether it qualifies as a watch, but it is referred to as a "Wrist Worn PC".  It is able to run either Linux or Windows CE, and can sense motion, allowing such possibilities of use such as going into standby mode when a user lowers his/her arm.  It can determine its position by dead reckoning as well as via GPS.  It supports Bluetooth, IrDA, and WiFi.

Pluribus: The Pluribus multiprocessor was an early multi-processor computer designed by BBN for use as a packet switch in the ARPANET.  Its design later influenced the BBN Butterfly computer.

Supporting paragraphs: Pluribus BBN Technologies
Answer: BBN Technologies