Encyclopedias, Almanacs, Transcripts, and Maps
- Trans-Himalaya
- Trans-Ili Alatau
- transactional analysis
- Transandine Railway
- Transantarctic Mountains
- Transbaykalia
- Transcarpathian Region
- Transcaspian Region
- transcendental number
- transdermal delivery system
- transdermal patch
- transfinite number
- transit compass
- Transleithania
- Transoxiana
- Transpadane Republic
- Transportation, United States Department of
- Tranströmer, Tomas
- Transylvania Company
- Transylvanian Alps