Ключевые слова: address, addresser, background, brown, color, communication, correspondence, deliver, delivering, delivery, design, envelope, envelopes, flat, group, information, invitation, kraft, lay, layout, letter, logistic, mail, mailer, mailing, many, message, object, open, paper, post, postage, postal, receive, send, sender, service, shipment, simple, simplicity, stationery, top, transfer, transferring, view,