Ключевые слова: adult, book, business, businessman, businessperson, caucasian, company, concentration, corporate, datum, diary, earphones, employee, entrepreneur, executive, expertise, eyeglasses, focused, formal, horizontal, indoor, information, job, knowledge, literature, male, man, manager, mature, note, notebook, occupation, office, one, optimism, people, person, positive, professional, reader, reading, research, sitting, success, technology, wireless, wisdom, working, workplace,