Ключевые слова: address, air, airmail, background, bank, banking, bills, blank, book, brown, business, card, color, communication, concept, correspondence, currency, data, delivery, document, email, empty, envelope, express, finance, information, internet, isolated, letter, mail, mailing, message, money, note, office, open, package, page, paper, pen, post, postage, postal, postcard, receive, send, service, stamp, white, write,