The Industry reference article from the Simple Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Industry

Industry includes all forms of economic activity. It can be divided into four sectors according to the nature of the activity.

Primary industry extracts natural materials and provides raw materials for secondary industry. Secondary industry processes raw materials or semi-finished goods into more valuable products. Tertiary industry is the provision of services. Quaternary industry is the activity related to the application, manipulation and transmission of information.

In a narrow sense, industry is confined to manufacturing activities.

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