PTX
- .ptx
- 2nd Super Robot Wars Original Generation
- Contador Airport
- List of explosives used during World War II
- PTX (album)
- Paclitaxel
- Palytoxin
- Parallel Thread Execution
- Pentatonix
- Pentraxin
- Pertussis toxin
- Picrotoxin
- Pillowtex Corporation
- Plano, Texas
- Pneumothorax
- Prescient Therapeutics
- Pro Tools
- Providence Therapeutics
- Pumiliotoxin
- Putian West railway station