35 Procurement, namely, purchasing for others audio and video equipment, audio special effects equipment, intercom equipment, paging equipment, lighting equipment and systems
37 Installation, maintenance and repair of audio and video equipment, audio special effects equipment, intercom equipment, paging equipment, lighting equipment and systems
40 Assembly for others of audio and video systems, audio special effects systems, intercom systems, paging systems, lighting systems
42 Rental of computer systems, namely computer software and hardware; design for others in the field of audio and video systems, audio special effects systems, intercom systems, paging systems, lighting systems