| ACSD | Abbeville County School District 
| Others |
| ACSD | Accelerated Child Survival and Development
| Others |
| ACSD | Access Centre for Students with Disabilities
| Others |
| ACSD | Accredited Cabinetry and Space Designer
| Others |
| ACSD | Acorn Cardiac Support Device
| Others |
| ACSD | Addison Central School District
| Others |
| ACSD | Adult Cardiac Surgery Database
| Others |
| ACSD | Advanced Container Security Device
| Others |
| ACSD | Advisory Committee for Student with Disabilities
| Others |
| ACSD | Advisory Committee for Students with Disabilities
| Others |
| ACSD | Albanian Center for Sustainable Development
| Others |
| ACSD | Albany County School District
| Others |
| ACSD | Albion Central School District
| Others |
| ACSD | Allamakee Community School District
| Others |
| ACSD | Allied Climbers of San Diego
| Others |
| ACSD | Ames Community School District
| Others |
| ACSD | Amherst Central School District
| Others |
| ACSD | Amino Carboxymuconate Semialdehyde Decarboxylase
| Others |
| ACSD | Anaheim City School District
| Others |
| ACSD | AOL Connectivity Service Desktop
| Others |
| ACSD | Application of Concurrency to System Design
| Others |
| ACSD | Arlington Central School District
| Others |
| ACSD | Assistance for Children with Severe Disabilities
| Others |
| ACSD | Association for Christians in Student Development
| Others |
| ACSD | Association of Christians in Student Development
| Others |
| ACSD | Association of Computing Services Directors
| Others |
| ACSD | Association of Covenant Spiritual Directors
| Others |
| ACSD | Athens City School District
| Others |
| ACSD | Atlantic Community School District
| Others |
| ACSD | Automatic Child Seat Detection
| Others |
| ACSD | Automatic Cold Start Device
| Others |
| ACSD | Aviation Child Safety Device
| Others |