design, integration, installation, servicing, maintenance, sale and leasing of professional, commercial and industrial audio and videoconferencing equipment, audio production and recording equipment, cameras, camcorders, lenses, cables and related accessories, information, audio-video and multimedia control systems and networks, displays and monitors, videowalls, projectors and projection screens, equipment racks and rack mount systems, recorders and players, sound and acoustic products, video editing, production and streaming media equipment, whiteboards and presentation accessories, digital imaging products, nurse call systems, security systems, closed circuit television systems, fire alarm systems, access control systems, CATV and MATV, synchronized clock systems, intercom and telephone communication systems, paging equipment, emergency voice evacuation systems, media management systems, audio-video furniture, lighting and studio support equipment, recording media and storage systems, and video signal interfacing and routing systems