PX
- Air Niugini
- Chi Rho
- Medical prescription
- Medical procedure
- Operation PX
- P (disambiguation)
- PX Index
- PXS (disambiguation)
- Part exchange
- Patient experience
- Pedro Ximénez
- Peroxidase
- Phaeophyceae
- Pixel
- Post exchange
- Praxair
- Protein crystallization
- Pyroxenes
- Saviem PX
- X (disambiguation)
- XP (disambiguation)
- Xanthophyceae