Ключевые слова: action, audiovisual, background, black, blue, business, cinema, classroom, closeup, color, conference, demonstration, design, device, digital, education, electronic, entertainment, equipment, home, lamp, lcd, learning, lecture, lens, lesson, light, meeting, mini, modern, movie, multimedia, nobody, object, office, presentation, professional, projection, projector, purple, school, study, system, technology, video, view, visual, working,