DDA
- Bihar
- Daraundha
- Dda (DNA-dependent ATPase)
- Delhi Development Authority
- Demand deposit account
- Demand-driven acquisition
- Digital differential analyzer
- Digital differential analyzer (graphics algorithm)
- Disability Discrimination Act (Switzerland)
- Disability Discrimination Act 1992
- Disability Discrimination Act 1995
- Discontinuous Deformation Analysis
- Discrete dipole approximation
- District attorney
- Division on Dynamical Astronomy
- Doha Development Agenda
- Dual Dynamic Acceleration
- Dubai Development Authority
- Duraundha Junction railway station
- Dutch Dakota Association
- India
- Siwan, Bihar