TDF
- Behavioural change theories
- Companies listed on the New York Stock Exchange (T)
- TDF Group
- Tab delimited
- Target date fund
- TenDRA Distribution Format
- Tenofovir
- Territorial Defense Forces (Ukraine)
- Testis determining factor
- The Dawood Foundation
- The Dayton Family
- The Dhol Foundation
- The Document Foundation
- Theatre Development Fund
- Thessaloniki Documentary Festival
- Tierra del Fuego
- Tigray Defense Forces
- Tire-derived fuel
- Total dietary fiber
- Totally Dysfunctional Family
- Tour de Force (disambiguation)
- Tour de France
- Trusted Data Format
- Télé Distribution Française