Ключевые слова: address, air, airmail, background, blank, brown, color, communication, concept, confidential, correspondence, data, delivery, detail, document, email, empty, envelope, information, internet, letter, mail, mailing, message, money, note, object, office, old, open, package, packet, paper, pen, post, postage, postal, receive, send, service, single, stamp, stationery, texture, white, write,