4-H is a U.S.-based network of youth organizations whose mission is "engaging youth to reach their fullest potential while advancing the field of youth development". Its name is a reference to the occurrence of the initial letter H four times in the organization's original motto "head, heart, hands, and health", which was later incorporated into the fuller pledge officially adopted in 1927. In the United States, the organization is administered by the National Institute of Food and Agriculture of the United States Department of Agriculture (USDA). 4-H Canada is an independent non-profit organization overseeing the operation of branches throughout Canada. There are 4-H organizations in over 50 countries; the organization and administration varies from country to country.