Website Links Here are some other sites we recommend. Texas Department of Aging and Disability Services (DADS) Department with the government of Texas which regulates and funds services to individuals with disabilities. Providers Alliance for Community Services of Texas (PACSTX) Statewide association of providers of services to individuals with developmental disabilities. American Association on Intellectual and Developmental Disabilities (AAIDD) Nationwide professional association run by and for professionals who support people with intellectual and developmental disabilities. The ARC The ARC today is the world’s largest grassroots organization of and for people with intellectual and developmental disabilities. The ARC of Texas The Arc of Texas is the oldest and largest nonprofit, volunteer organization in the state committed to creating opportunities for people with intellectual and developmental disabilities to be included in their communities and to make the choices which affect their lives. The ARC of the Capital Area Committed to promoting independence and choice by providing individualized services to adults and children with developmental disabilities.