COMPUTER NETWORK HARDWARE EQUIPMENT; SMART NETWORK COMPUTER CARDS FOR INTERFACING COMPUTERS IN A NETWORK; RADIO; SATELLITE TV SIGNAL CONVERTERS; HEADSETS FOR TELEPHONES AND COMPUTERS; ELECTRICAL SIGNAL TUNERS; SATELLITE LOW NOISE AMPLIFIER; LOW NOISE AMPLIFIER; AMPLIFIER; PREAMPLIFIER; ANTENNA; MODEMS; ELECTRICAL SIGNAL COUPLERS; RADIO TRANSMITTER; RADIO RECEIVER; POWER AMPLIFIER; GLOBAL POSITIONING SYSTEM; ELECTRICAL SIGNAL BOOSTERS; INTERNET TV SET-TOP BOX; SATELLITE SIGNAL RECEIVER