Communications hardware and software, namely, network servers, computer terminals, processors and computer interface boards, signal routers, electronic switches, hubs, bridges, radio transmitters and receivers, optical transmitters and receivers, transceivers, encoders, decoders, multiplexes, modulators, demodulators, modems, converters, frequency shifters, signal regenerators, signal repeaters, signal processors, and antennae; power supplies and battery chargers; electronic signal filters; and computer programs for operating and managing telecommunications and data communications systems,
Electrical and Scientific ApparatusInstallation and maintenance of telecommunications and data communications systems for others
Building Construction and RepairTraining in the use and operation of telecommunications and data communications systems
Education and EntertainmentDesign and testing of telecommunications and data communications systems for others
Computer and Scientific