System Development Corporation also built a Simulation Facility in Paramus, New Jersey to model the SAC Command Post using "Command/Control personnel stations, capabilities to produce simulated SACCS hardware printouts…wall displays [and] a soundproof observation deck [booth] in which SIMFAC personnel perform actions necessary to simulate all external occurrences starting from an Intelligence buildup to changes in threat responses"--the "isolation booth" was completed in 1962 by International Electric Corporation. (en)