Cable television transmitters; Global positioning system (GPS) consisting of computers, computer software, transmitters, receivers, and network interface devices; Hardened units composed of microprocessors and integrated transmitters and receivers installed in the field and on board both mobile and stationary equipment in large scale mining, construction, and industrial operations to collect data from various applications, to transmit the data to central processing facilities, and to receive data transmissions directed to the applications and equipment; Hardened units composed of microprocessors and integrated transmitters and receivers installed in the field at large scale mining, construction, and industrial sites to collect data from monitoring and control installations, to transmit the data to central processing facilities, and to receive data transmissions directed to the installations; Radio receivers and transmitters; Radio transmitters; Radio transmitters and receivers; Satellite transmitters and receivers; Telecommunications transmitters; Television transmitters; Transmitters and receivers for audio and video signals for transmission over twisted pair cables; Transmitters of electronic signals; Vehicle locating, tracking and security system comprised of an antenna and radio transmitter to be placed in a vehicle; Vehicle tracking devices comprised of cellular radio modules, computer software and computer hardware, sensors, transmitters, receivers and global positioning satellite receivers, all for use in connection with vehicle tracking, vehicle monitoring and anti-theft vehicle alarms; Wireless transmitters and receivers