Providing information related to the installation, maintenance and repair of HVAC systems, network systems, fire alarm systems, electrical systems, fiber systems, BMS systems, lighting control systems, low voltage systems, and mechanical piping; Installation, maintenance and repair of HVAC systems, network systems, fire alarm systems, electrical systems, fiber systems, BMS systems, lighting control systems, low voltage systems, and mechanical piping; Installation of HVAC systems, network systems, fire alarm systems, electrical systems, fiber systems, BMS systems, lighting control systems, low voltage systems, and mechanical piping; Installation and maintenance of HVAC systems, network systems, fire alarm systems, electrical systems, fiber systems, BMS systems, lighting control systems, low voltage systems, and mechanical piping; Electrical repairs and installation of HVAC systems, network systems, fire alarm systems, electrical systems, fiber systems, BMS systems, lighting control systems, low voltage systems, and mechanical piping systems; Advisory services relating to the installation of building automation equipment; Installation of building automation equipment; Installation, maintenance and repair of building automation equipment; Installation, maintenance and repair of computer servers; Installation, maintenance and repair of computer hardware; Installation, maintenance and repair of Ethernet and wireless networking hardware; Installation of computer networking hardware; Installation, maintenance and repair of computer network and information technology equipment; Installation of communications network apparatus; HVAC contractor services; Maintenance of HVAC systems, network systems, fire alarm systems, electrical systems, fiber systems, BMS systems, lighting control systems, low voltage systems, and mechanical piping; Consultancy relating to the installation, maintenance and repair of heating, ventilation and air conditioning (HVAC) systems; Installation of HVAC systems; Installation, maintenance and repair of heating, ventilation and air conditioning (HVAC) systems; Installation, maintenance and repair of fire alarms; Installation and maintenance of fire alarm, detection and suppression systems; Electrical repairs, maintenance, and installation of electrical wiring, outlets, light fixtures, and electrical panels; Maintenance of electronic apparatus

Design and inspection of fire alarm, detection and suppression systems; Custom design and engineering of telephony systems, cable television systems and fiber optics; Providing planning and engineering services in the field of information and communications networks; Computer services, namely, integration of computer software into multiple systems and networks; Computer network configuration services; Scientific and technological services, namely, research and design in the field of computer networking hardware