Ключевые слова: audience, audiovisual, background, beam, blue, board, boardroom, business, classroom, closeup, colour, communication, computer, conference, digital, discussion, display, education, entertainment, equipment, event, film, hall, indoor, interior, learning, lecture, lens, light, meeting, modern, movie, multimedia, object, office, people, presentation, projection, projector, room, screen, seminar, slide, table, teamwork, technology, training, video, watching,