Keystone Human Services is a non-profit organization that provides community-based services for children, adults, and families in Pennsylvania, Connecticut, and Delaware. The organization was founded in 1972 by Dennis Felty and Charles Hooker, and it has since grown to become one of the largest providers of community-based services in the United States. Keystone Human Services offers a wide range of services, including intellectual disability services, mental health services, autism services, and early intervention services. The organization is committed to promoting the inclusion and independence of people with disabilities and their families.