| Acronym | Definition |
|---|
| TCIS➣Taejon Christian International School (Korea) |
| TCIS➣Thai Chinese International School |
| TCIS➣Teacher Certification Information System |
| TCIS➣Tidewater Conference of Independent Schools |
| TCIS➣Trial Court Information System |
| TCIS➣Treasury Check Information System |
| TCIS➣Tactical Communications Interface Software |
| TCIS➣Taux de Chômage à Inflation Stationnaire (French: Non-Accelerating-Inflation Rate of Unemployment) |
| TCIS➣TIE Control and Integration Subsystem |
| TCIS➣Traitement Cooperatif et Integration des Systèmes |
| TCIS➣Transport Canada Information Service |
| TCIS➣Tactical Command Information System |
| TCIS➣Targys Customer Inquiry System |