- DRRI stands for Deployment Risk and Resilience Inventory (US VA)
- DRRI stands for Deluxe Reverb Reissue (Fender)
- DRRI stands for Defense Race Relations Institute
- DRRI stands for Digital Radio Research Inc. (now Digital Radio Roll Out Inc.; Canadian broadcasting consortium)
- DRRI stands for Direction Régionale des Renseignements Intérieur (French: Regional Directorate of Internal Information)
DRRI