Ключевые слова: abstract, aluminum, background, bar, bar code, black, book, business, censorship, chain, chains, code, concept, confidential, corrugated, detective, file, freedom, gray, grey, ideas, industrial, industry, information, intellectual, iron, isolated, knowledge, law, line, lines, lock, material, metal, metallic, old, orthodox, padlock, pattern, pray, protection, report, secret, security, silver, steel, striped, symbol, texture, white,