The International Standard Industrial Classification system of All Economic Activities (ISIC) is maintained by the United Nations (UN).
Industry refers to the most detailed category available in NAICS to describe business activities. NAICS provides hundreds of separate industry categories, unique categories that reflect different methods used to produce goods and services. Statistical agencies use industry categories to classify, collect, process, publish, and analyze business statistics. The census uses industry categories to customize census forms, combine information from establishments in the same industry, and publish census statistics.
ISO 14000 refers to the standards and guidelines defined by the International Standards Organization for environmental management systems.