DDSI
| Acronym | Definition |
|---|---|
| DDSI | Direction Développement du Système d'Information (French: Development Department Information System) |
| DDSI | Digital Descriptor Systems, Inc. (Farmingdale, NJ) |
| DDSI | Dependability Development Support Initiative (2001-2002) |
| DDSI | Directorate of Defense Services Intelligence |
| DDSI | Divorce, Drugs, and the Slipping Image (book) |
| DDSI | Didemethylsecoisolariciresinol |
| DDSI | Dual Direct Spark Ignition |