Ключевые слова: a1, a2, a3, american, ansi, book, booklet, brochure, chart, concept, copy, doc, document, file, flat, icon, international, iso, label, landscape, ledger, legal, letter, line, measures, north, office, orientation, page, paper, press, print, printery, printing house, report, series, set, shape, sign, simple, size, standard, symbol, system, tabloid, text, us, usa, web,