Ключевые слова: audiovisual, background, beam, blue, board room, boardroom, broadcasting, business, cinema, classroom, closeup, computer, conference, copy, corporate, demonstration, digital, display, education, equipment, event, lamp, learning, lecture, lens, light, meeting, modern, movie, multimedia, object, office, presentation, presenting, projection, projector, room, screen, seminar, showing, slide, space, table, technology, training, video, visual, white, working,