Radio and television transmission systems comprising transmitters, exciters, antennas, microphones, speakers, monitors, signal mixers, audio and video signal encoders and decoders and editing equipment, namely, signal processors; broadcast studio automation software; broadcast studio consoles; transmitters, receivers, repeaters and antennas for satellite communications; telephone tests sets for testing and measuring telephone line parameters and signals thereon; computer operated network systems comprising computer hardware and software for transmitting data between computers connected in a network and for managing the computers and the transmission of the data on said network; avionics systems comprising digital maps, fiber-optic and wire data busses, memory devices, instrumentation for displaying, storing, processing, and retrieving weather, tactical, strategic and secure data; cockpit controls and data displays; phased array antennas; global positioning equipment comprising data processors and displays, air traffic control communications systems comprising computer hardware and software for displaying transporting, transmitting, controlling, switching, routing, and receiving air traffic information; computers and computer software for converting images into data, and for analyzing, displaying and printing the data in the field of two and three dimensional image extraction, manipulation, display, and geographic registration; secure computer operated systems consisting of computer hardware and computer software, and encrypted databases, all used for ensuring and controlling the security and access of a computer network and the information contained therein namely, tracking air traffic and transmitting encrypted messages to pilots, database management, file transfer, and for connecting computers and databases; airline management systems comprising computers and software for database management and for exchanging aircraft and aircraft operations information; radio frequency and microwave point-to-point and point-to-multipoint communication systems for civilian, government and military applications; meteorological information processing systems; wireless local area network transmitters and receivers; data encryption hardware and software; computer software for telecommunications network management and operational systems support