Ключевые слова: address, background, blackboard, board, box, business, chalkboard, communicate, communication, computer, concept, contact, correspondence, customer, email, envelope, hand, inbox, information, internet, join, letter, list, mail, mailbox, mailing, marketing, media, message, net, networks, new, newsletter, online, post, postage, postal, send, service, sign, sns, social, subscribe, subscription, symbol, text, web, white, word,