As a subsidiary of Physical Sciences Inc., Andover, MA., Research Support Instruments designs, test and manufactures precision optical and electronic instrumentation for space and other demanding environments. The firm also provides scientific and engineering services, space mission design, systems engineering and test, mission implementation, atmospheric science, plasma applications, optical calibration, spin balance equipment and precision machining. The firm is located in Lanham, MD with facilities in Princeton, NJ and a former facility in Boulder, CO.