The Encyclopedia of American Industries is a major business reference tool that provides detailed, comprehensive information on a wide range of industries in every realm of American business. Volume I provides separate coverage of 459 manufacturing industries. Volume II presents 545 essays covering the vast array of service and non-manufacturing industries in the United States. Combined, these two volumes provide individual essays on every industry recognized by the U.S. Standard Industrial Classification (SIC) system, Both volumes of EAI are arranged numerically by SIC code for easy use. Additionally, each entry in the fourth edition includes the corresponding North American Industry Classification System (NAICS) codes. Industry The Encyclopedia's business coverage includes information on historical events of consequence, as well as relevant trends and statistics entering the 21 century. Sections of coverage in an essay may include the Industry Snapshot, Organization and Structure, Background and Development, Current Conditions, Industry Leaders, Workforce, America and the World, Research and Technology, Further Reading, Graphs, Conversion tables, and Indexes.