Ключевые слова: 3d, adult, background, blackboard, blank, board, boardroom, business, chair, class, classroom projector, computer, conference, desk, digital, education, empty, equipment, event, illustration, information, interactive, interior, isolated, learn, learning, lecture, light, meeting, modern, monitor, movie, multimedia, office, presentation, projection, rendering, room, school, screen, seminar, show, table, teacher, teaching, technology, training, university, wall, white, whiteboard,