 |
| Subject | English | Thesaurus |
| mil., abbr. | Non- ACAT Program Definition Document | NAPDD |
| NASA, abbr. | Program Definition and Risk Reduction life cycle phase | PDRR |
| abbr., astronaut., mil. | Program-Definition and Risk-Reduction | PDRR (acquisition program phase) |
| abbr., scottish | Program Definition & Risk Reduction | PDRR (US procurement system) |
| abbr., scottish | Programme Definition Phase | PDP |
| abbr., file.ext. | Web Services Definition/Description Language | WSDL (IBM/Microsoft) |
| abbr., progr. | web services definition language | web service definition language (ssn) |
| comp., abbr. | Web Services Definition Language | WSDL |