Ключевые слова: abstract, background, business, cell, communication, concept, connections, corporate, crash, digital, double, drawing, electronic, email, employee, entrepreneur, envelop, exposure, fill in, freelance, hands, icon, internet, invest, investment, mail, man, message, multi, online, people, phone, professional, purchase, relation, send, smart, sms, social, spam, stats, symbol, tablet, telephone, touchscreen, web, wireless, work, writing,