Ключевые слова: advertisement, application, background, box, business, chat, chatting, closed, color, communication, concept, connection, contact, conversation, cyberspace, design, dialogue, digital, email, envelopes, express, flat, green, information, internet, invitation, lay, letter, letters, lifestyle, mail, mailing, media, message, network, nobody, object, office, online, post, postage, postal, send, service, sms, social, top, view, virtual, website,