The National Institute of Governmental Purchasing (NIGP) developed a commodity and services classification system for use by state and local governments, the NIGP Code. The NIGP Code is used by 33 states within the United States as well as thousands of cities, counties and political subdivisions. The NIGP Code is a hierarchical schema consisting of a 3 digit class, 5 digit class-item, 7 digit class-item-group and an 11 digit class-item-group-detail. Applications of the NIGP Code include vendor registration, inventory item identification, contract item management, spend analysis and strategic sourcing.