Computer installation and repair; Installation and repair of computer hardware; Installation of computer networks; Installation of computer systems; Installation, maintenance and repair of computer hardware; Maintenance and repair of computer hardware; Maintenance and repair of computer networks; Maintenance of computer hardware; Maintenance of computer hardware systems; Repair of computer hardware; Repair of damaged computers; repair or maintenance of computers; Updating of computer hardware...

Testing, analysis and evaluation of the goods and services of others for the purpose of certification