| Acronym | Definition |
|---|
| DIAP | Departamento de Investigação E Acção Penal (Portugese: Department of Investigation and Prosecution) |
| DIAP | Defense Information Assurance Program |
| DIAP | Development and Institutional Advancement Program (Association of Theological Schools) |
| DIAP | Drosophila Inhibitor of Apoptosis Protein |
| DIAP | Deutsche Internationale Abiturprüfung |
| DIAP | Democracy in America Project |
| DIAP | Datascope Improved Ascii Protocol (interface for programmatically retrieving vital signs readings) |
| DIAP | Data and Information Acquisition Plan (UK) |