Ключевые слова: adult, apple store, business, businessman, caucasian ethnicity, classroom, closeup, communication, computer, connection, desk, digital tablet, discussion, document, education, equipment, expertise, females, group of people, holding, human hand, indoors, internet, learning, lifestyles, males, meeting, men, mobile phone, note pad, occupation, office, one person, people, seminar, sitting, smart phone, student, table, teamwork, technology, telephone, university, unrecognizable person, wireless technology, women, working, writing, young adult,