Ключевые слова: abstract, background, business, cellphone, cellular, communication, computer, concept, connection, contact, cyberspace, design, device, digital, electronic mail, email, email marketing, envelope, global, icon, information, internet, letter, mail, marketing, media, message, mobile, network, newsletter, online, pc, people, post, receive, screen, send, smartphone, sms, social, spam, symbol, target, tech, technology, touch, typing, web, wireless,