Ключевые слова: 40s, adult, book, business, career, class, college, computer, concept, development, education, educational, female, further, group, happy, higher, horizontal, illustration, indoors, information, knowledge, laptop, learn, learning, male, man, people, person, research, school, sitting, skill, smiling, student, study, studying, success, teacher, technology, text, textbook, together, training, university, up, woman, work, working,