Ключевые слова: audiovisual, beam, blue, board room, boardroom, broadcasting, business, classroom, coach, colour, computer projector, conference, conference table, copy space, demonstration, digital, display, education, equipment, event, gray, horizontal, illuminated, instructor, lamp, learning, lecture, lens, light, meeting, movie, multimedia, office, overhead projector, presentation, presenter, presenting, projection, projection equipment, projector, screen, screening, seminar, showing, slide, table, technology, training, video, video conference, video projector, workshop,