9 SIGNAL PROCESSING AND CONVERSION SYSTEMS, NAMELY SIGNAL PROCESSORS AND DATA CONVERTERS FOR DIGITAL COMPUTERS; DISPLAY SYSTEMS, NAMELY COLOR AND MONOCHROME HIGH/MEDIUM RESOLUTION MONITORS, GRAPHICS GENERATORS/PROCESSORS, ALPHANUMERIC KEYBOARDS, TRACKBALLS, JOYSTICKS, FINGER-ON-GLASS CONTROLLERS, COMPUTER INTERFACE CIRCUITS; MULTIPLEXING EQUIPMENT NAMELY * DIGITAL * MULTIPLEXORS AND CONTROL CIRCUITS; ELECTROMECHANICAL CONTROL EQUIPMENT, NAMMELY OPERATOR INTERACTIVE SHIPBOARD PRECISION NAVIGATIONAL PLOTTING INSTRUMENTS; ELECTROMECHINAL TEST EQUIPMENT NAMELY SYNCHROZEROING STANDARDS, SYNCHRO TRANSMITTING AND RECEIVING STANDARDS, AND MULTISPEED SIGNAL TRANSMITTERS; CRYPTOGRAPHIC ENCRYPTION/DECRYPTION SYSTEMS, NAMELY SECURE VOICE COMMUNICATION PROCESSORS AND CONTROLLERS, KEY FILL AND KEY TRANSFER UNITS AND SECURE SATELLITE COMMAND LINK PROCESSORS; AND PNEUMATIC CONTROLS AND TESTERS IN THE FORM OF PRECISION SIMULATORS, NAMELY [ PILOT/ ] * PITOT/ * STATIC AIRSPEED/ALTITUDE TESTERS, AND PRESSURE/VACUUM PUMPS