The Arc is the national organization for people with mental retardation and related developmental disabilities and their families. It is devoted to promoting and improving support and services for these people. The association also fosters research and education regarding the prevention of mental retardation in infants and children. The Arc was founded in 1950 and is a grassroots organization with nearly 140,000 members who are affiliated through approximately 1,000 state and local chapters throughout the United States. The company offers a variety of services, including early intervention, health care and free public education and support for their families. For adults, services and support may include preparation for employment, help in finding a job, independent living skill training, leisure and recreation activities and any other supports they need. Arc has a location in El Centro, Calif.