| 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 |