Ключевые слова: 20s, 30s, 40s, black, business people, caucasian, cheerful, class, classroom, college, computer, computer monitor, desk, electronic, female, happy, hispanic, indoors, internet, job, joyful, keyboard, laptop, learn, learning, looking at camera, looking away, male, man, mature adult, merry, mid adult, monitor, mouse, notebook, office, part of, pc, room, screen, sitting, smile, smiling, student, study, studying, teacher, technology, typing, university, using, white background, woman, work, worker, working, workplace, young adult,