| Abbreviation | Definition |
|---|---|
| ADD | Action on Disability and Development |
| ADD | Application Development and Deployment |
| ADD | Architecture Design and Development |
| ADDD | A Depository of Development Documents |
| ADDF | Application Development Decision Framework |
| ADDI | Analysis Design Development Implementation |
| ADDIE | Analysis Design Development Implementation and Evaluation |
| ADDRO | Anglican Diocesan Development And Relief |
| ADDRO | Anglican Diocesan Development and Relief Office |
| ADDRO | Anglican Diocesan Development and Relief Organisation |
| ADDRO | Anglican Diocesan Development Relief Organization |
| ADDT | Adult Development Day Treatment |
| ADDT | AIDS Discovery and Development of |
| ADDT | AIDS Discovery and Development of Therapeutics |
| ADDT | ASSAY and Drug Development Technologies |
| ADE | Aeronautical Development Establishment |
| ADE | API Development Environment |
| ADE | Application Development Engine |
| ADE | Application Development Environment |
| ADE | Association for the Development of the Exceptional |