TDP
- Communal Democracy Party
- Democratic Party of Turkmenistan
- Democratic Party of Turks
- Grimjack
- Socialist Democratic Party (Turkey)
- TARDBP
- TDaP
- Teledeporte
- Telugu Desam Party
- Territoires de progrès
- Thames Discovery Programme
- Thermal depolymerization
- Thermal design power
- Thiamine pyrophosphate
- Thymidine diphosphate
- Torsades de pointes
- Tour de Pologne
- Transparent Distributed Processing