Installation of machines; maintenance and repair of communications systems; repair of machines; electric appliance installation; electric appliance installation and repair; electrical apparatus installation; electrical installation services; information technology (IT) services (computer and computer peripherals installation and maintenance); installation and repair of computer hardware; installation of communications network apparatus; installation of communications network instruments; installation of computerised information systems; installation of computers; installation of electrical apparatus; installation of machines; installation, maintenance and repair of computer hardware; installation, maintenance and repair of computer peripherals; installation, maintenance and repair of middleware (computer hardware); machinery installation services; machinery installation, maintenance and repair; maintenance and repair of electronic installations; maintenance, installation and repair of electrical items and equipment