Ключевые слова: audience, audiovisual, background, black, board, business, closeup, conference, connected, digital, education, entertainment, equipment, film, hall, illuminate, laser, lecture, led, lens, lesson, light, looking, meeting, modern, movie, multimedia, office, people, photo, presentation, projection, projector, ready, room, screen, seminar, show, showing, sitting, slide, table, technology, video, view, viewer, visual, watching, work,