Ключевые слова: 45s, 55s, 65s, activity, adult, aged, audience, auditorium, class, classroom, computer, concentrated, course, education, educator, elderly, emotions, explaining, faculty, group, indoors, information, institute, intelligence, interested, internet, knowledge, learning, leisure, lesson, lifestyle, men, modern, people, portrait, software, students, study, surfing, teacher, technology, training, tutorial, university, using, women, workshop, young,