Ключевые слова: 4g, acronym, app, application, blackboard, business, call, cell, cellphone, cellular, chalkboard, communication, computer, concept, connection, device, equipment, fast, gesture, hand, hold, information, interface, internet, lte, media, mobile, mobility, net, network, pad, pda, phone, pocket, portable, screen, sign, smartphone, software, speed, standard, tablet, technology, telecommunications, telephone, touch, transmission, wifi, wireless, www,