Ключевые слова: audience, auditorium, black, board, business, class, classroom, college, color, computer, conference, discussion, education, event, exam, flat, group, guest, icons, internet, isolated, leader, lecture, line, linear, office, outline, people, person, podium, presentation, professor, public, report, room, school, seat, seminar, set, solution, speak, speaker, speech, student, teach, teacher, thin, training, university,