| Acronym | Definition |
|---|
| DSSI | Digital Small Storage Interconnect |
| DSSI | Diplôme en Sécurité des Systèmes d'Information (French: Diploma in Information Systems Security; Switzerland) |
| DSSI | Disposable Soft Synth Interface (software) |
| DSSI | Diversified Scientific Services, Inc. |
| DSSI | Digital Storage Systems Interconnect |
| DSSI | Data Systems and Software Inc. (Mahwah, NJ) |
| DSSI | Dyspepsia Symptom Severity Index |
| DSSI | Dead Sea Scrolls Institute (Trinity Western University, Canada) |
| DSSI | Directions de la Sécurité des Systèmes d'Information (French: Information Systems Security Directorate) |
| DSSI | Deep Surgical Site Infection |