37 TELECOMMUNICATION WIRING, COMPUTER INSTALLATION AND REPAIR, INSTALLATION AND MAINTENANCE OF BURGLAR ALARMS AND FIRE ALARMS, INSTALLATION OF ELECTRICAL SYSTEMS AND APPLIANCES, INSTALLATION OF COMPUTER NETWORKS, INSTALLATION OF COMPUTER SYSTEMS, INSTALLATION OF SECURITY SYSTEMS, INSTALLATION OF TELEPHONE LINES, INSTALLATION OF THEFT PREVENTION DEVICES, SATELLITE DISH INSTALLATION AND REPAIR, TELEPHONE INSTALLATION AND REPAIR, MAINTENANCE OF ALARM SYSTEMS, INSTALLATION AND MAINTENANCE OF COMPUTER NETWORKS