Ключевые слова: air mail, business communication, communication, concept, correspondence, delivery, direct mail, email, envelopes, express, floating, flurry, flying, freedom, information, letters, lightweight, lightweight communication, mail, mail concept, mail delivery, message, messaging, modern communication, motion, movement, paper, paper envelopes, paper flying, paper trail, post, postage, postal, receiving, sending, snail mail, snailmail, spread, stationary, traditional mail, white background, white envelopes,