PRT
- Claro Puerto Rico
- PRT Company Limited
- PRT Records
- Pain reprocessing therapy
- Personal rapid transit
- Petroleum Revenue Tax
- Pittsburgh Regional Transit
- Pivotal response therapy
- Platinum resistance thermometer
- Poor Righteous Teachers
- Portugal
- Power Rangers Turbo
- Precomputed Radiance Transfer
- Prerequisite Tree
- Prestatyn railway station
- Preterite
- Prison Reform Trust
- Provincial Reconstruction Team
- Revolutionary Workers' Party (Mexico)
- Workers' Revolutionary Party (Argentina)
- Workers' Revolutionary Party (Nicaragua)
- Workers' Revolutionary Party (Peru)
- Workers' Revolutionary Party (Portugal)
- Worm (web serial)