| Acronym | Definition |
|---|
| PAX | Passengers |
| PAX | Personnel |
| PAX | Pixel Addressing Extensions |
| PAX | Parallel Architecture Extended |
| PAX | Pathway Data Exchange |
| PAX | Paired Box Gene |
| PAX | Paxon (Network) |
| PAX | Patuxent River Naval Air Station (Maryland) |
| PAX | Private Automatic Exchange |
| PAX | Penny-Arcade Exposition (video game convention) |
| PAX | Portable Archive Exchange |
| PAX | Per Annum Exclusive |
| PAX | Potassium Amyl Xanthate |
| PAX | Programming, Administration and Execution System (US Army) |
| PAX | Poly Aluminium Chloride |
| PAX | Picatinny Arsenal Explosive |
| PAX | Profiling Agent for Exchange |
| PAX | Passenger Assistance Required (VRE) |
| PAX | Per Annum Exchange |
| PAX | Professional Autocrossers |