Ключевые слова: air, bible, blue, book, business, catalog, clip art, clipboard, cloud, concepts, contract, cubicle, dictionary, document, dreams, education, encyclopedia, equipment, file, folio, hole, illustration, learning, letter, lined paper, magination, message pad, nature, objects, office, paper, paperboard, plan, reading, research, shape, sign, sky, smoke, stack, striped, studying, symbol, textbook, white,