Ключевые слова: app, application, cellphone, cellular, chat, comment, community, connect, connection, connectivity, contacts, copy space, device, email, emoticon, engagement, envelope, friends, global, idea, information, interaction, internet, mail, marketing, media, message, mobile, mobile phone, network, networking, online, person, phone, receiving, reminder, request, sending, sharing, smart, smartphone, social, social media, social network, touching, user, using, wireless,