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Standard Industrial Classification

Standard Industrial Classification (SIC) is a U.S. government classification system that divides economic activities into broad divisions (manufacturing, mining, retail trade, etc.). Each division is further broken down into major industry groups (two-digit SIC code), then into industry sub-groups (three-digit SIC code) and, finally, into industries (four-digit SIC codes). For example, the SIC code for home refrigerators is 3632 while the SIC code for home laundry (washing) machine is 3633. Thus, a firm that manufactures both refrigerators and home laundry machines would compete in two industries identified by SIC codes 3632 and 3633. You can search the 1987 version SIC manual on the WWW at URL The North American Industry Classification System (NAICS) has updated and replaced the US Standard Industrial Classification system.

The US government uses a system of numeric codes to categorize companies by the type of business in which each is engaged. The SIC system begins with nine major categories -- agriculture, forestry, and fishing; mining; construction; manufacturing; transportation, communications, and public utilities; wholesale trade; retail trade; finance, insurance, and real estate; and services. These groups are divided into two-digit codes, then broken down to three-digit industry groups and finally into four-digit industry codes. Businesses engaged in the same activity, regardless of size or type of ownership, have the same SIC code. Many business information sources are organized by the SIC codes. The North American Industry Classification System (NAICS) was devised to bring together the systems of Canada, Mexico, and the United States. The following manual is a guide to SIC codes:

Standard Industrial Classification (SIC) Manual The official US government manual which provides SIC codes at the 2-digit and 4-digit levels. HA40.I6.U587 1987

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