There are various systems used for industry research to classify business entities. Knowing these schemes can make some areas of research easier because some databases, many of the print sources, and the U.S. government (most notably the Census) use them in their indexing, charts, graphs, lists, and indexes. The most important of these in the United States are the North American Industrial Classification System (NAICS). Internationally the International Standard Industrial Classifications of All Economic Activities (ISITC) External is maintained by the United Nations. Manufacturing and retail are treated as their own activities so both are necessary to understand the industry as a whole.
More recently Census has developed the the North American Product Classification System (NAICPS) which is a hierarchical structure consisting of sections, subsections, divisions, groups, subgroups, and trilateral products.
Relevant codes from these systems for the cosmetics industry are included in the section below, along with links to government data related the cosmetics industry are included when available.