Ключевые слова: armchair, audiovisual, background, black, bright, business, chair, classroom, closeup, conference, congress, corporate, digital, education, empty, entertainment, equipment, event, film, hall, indoors, interior, lecture, lens, lesson, light, meeting, modern, movie, multimedia, no people, nobody, office, presentation, projection, projector, ready, room, screen, seminar, showing, slide, table, teaching, technology, training, video, view, visual, white,