Computer installation and repair; Installation and maintenance of burglar and/or fire alarms; Installation and maintenance of digital signage and audio visual products sold therewith; Installation and maintenance of fire alarm, detection and suppression systems; Installation and repair of business and office machinery and equipment; Installation of computer networking hardware; Installation of computer systems; Installation of electronic and digital connection to a call centre; Installation of home theatres and related structured wiring; Installation of security system; Installation of telephone lines; Installation of audio speakers, video cameras, sound systems, computer, smoke detectors, CO2 detectors, thermostats, computer memory, computer hard drives, security systems and, antivirus software; Installation, maintenance and repair of cell phone related hardware; Installation, maintenance and repair of computer hardware; Installation, maintenance and repair of computer printers; Installation, maintenance and repair of computer servers; Installation, repair and maintenance of computers and computer peripherals; Advisory services relating to the installation of audiovisual equipment; Advisory services relating to the installation of lighting apparatus; Advisory services relating to the installation of telephone equipment; Consultation about the repair of computer hardware; Customizing computer hardware; Maintenance and repair of computer networking hardware; Maintenance of computer hardware; Maintenance of computer hardware systems; Refurbishing of computers, printers, audio and video systems; Repair of computer hardware; Repair of damaged computers; Repair or maintenance of computers; Technical consultation in the field of installation of lighting apparatus, lighting instruments and lighting systems; Technical support services, namely, technical advice related to the installation of audio speakers, video cameras, sound systems, computer, smoke detectors, computer memory, computer hard drives, security systems, and antivirus software; Technical support services, namely, troubleshooting in the nature of the repair of computer hardware; Updating of computer hardware; Upgrading of computer hardware