DTSI
| Acronym | Definition |
|---|---|
| DTSI | Direction des Technologies et des Systèmes d'Information (French: Directorate of Technology and Information Systems) |
| DTSI | Digital Theater Systems, Inc. (stock symbol) |
| DTSI | Digital Twin Spark Ignition |
| DTSI | Defense Trade Security Initiative |
| DTSI | Data Technology Services, Inc. (Colorado) |
| DTSI | DataTel Solutions, Inc. (San Antonio, Texas) |
| DTSI | Datron/Transco Systems Incorporated |