Installation of burglar alarms; maintenance and servicing of security alarms; repair of alarms; residential, commercial and industrial installation and repair of electrical and computer wiring and cabling; installing of electronic communications networks; maintenance and repair of communications systems; maintenance and repair of data communications networks; maintenance and servicing of data processing installations; information technology (IT) services (computer and computer peripherals installation and maintenance); maintenance, installation and repair of electrical items and equipment; maintenance, installation and repair of household items and equipment; installation of security systems