Ключевые слова: audience, audiovisual, business, classroom, conference, cooling, device, digital, educational, electronic, entertainment, expensive, fan, film, fix, hd, home, indoors, lcd, leisure, lens, light, meeting, monitor, mount, mounted, movie, multimedia, new, object, orientation, overhead, photographic, presentation, project, projection, projector, recreation, recreational, repair, report, screen, seminar, teach, tech, technology, theatre, theatric, university,