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ELECTRONIC DATA DISPLAY SYSTEMS AND PARTS THEREOF, COMPRISING, COMPUTERS, CENTRAL SIGNAL PROCESSORS, HIGH SPEED READERS, DISPLAY CONSOLES, TAPE PUNCH UNITS, CODE TRANSLATORS, ALPHANUMERIC KEYBOARDS AND COMPUTER INTERFACE UNITS; ACCELEROMETERS; ACCELERATION SENSORS; ELECTRONIC SIGNAL DELAY LINES; ELECTRO-HYDRAULIC SERVO VALVE TEST STAND UNITS; GYROSCOPES; GYROSCOPIC SYSTEMS-NAMELY, MULTI-AXIS, GYROSCOPIC UNITS; RADAR SYSTEMS; RADAR PERSONNEL TRAINER ASSEMBLIES COMPRISING A RADAR SIGNAL SIMULATOR AND GENERATOR; OCEANOGRAPHIC MONITORING AND SURVEILLANCE SYSTEMS-NAMELY, SENSOR UNITS FOR DATA ACQUISITION, SIGNAL PROCESSING UNITS, AND DATA COMMUNICATION LINK UNTS; SONOBUOYS; AND GUIDANCE AND NAVIGATIONAL APPARATUS FOR USE IN AIRPLANE, MISSILES AND SIMILAR VEHICLES-NAMELY, OPTICAL SYSTEMS AND UNITS FOR MEASURING THE RELATIVE BEARING AND ELEVATION INFORMATION BETWEEN TWO LOCATIONS