CLTT
| Acronym | Definition |
|---|---|
| CLTT | Center for Logistics, Trade and Transportation (University of Southern Mississippi; Hattiesburg, MS) |
| CLTT | Community Land Trust of Tempe (Tempe, AZ) |
| CLTT | Child Language Teaching and Therapy (Sage Publications) |
| CLTT | Concrete Laboratory Testing Technician (American Concrete Institute) |
| CLTT | Club Longueillois de Tennis de Table (French table tennis club) |
| CLTT | Cloud Top Temperature |
| CLTT | Cho-Liang Thermal Technology (est. 1989; China) |