| 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 |