| Abbreviation | Definition |
|---|---|
| PWV | Physique & Workout in Ventnor |
| PWX | Phone & Wireless Message Express |
| PXC | PicSee |
| PXF | Parallel Express Forwarding |
| PXH | Phoenix Hawk |
| PXI | Praxis, Inc. |
| PXN | Paradox Network |
| PXN | Pasifik Expressindo |
| PXN | Project X Network |
| PXO | Parallax Online |
| PXP | Plains Resources Exploration & Production Company |
| PXS | Parts Exchange Salvage |
| PXS | Professional Experience Software Company |
| PXW | Physique & 'Xercise in Warrington |
| PYB | Promote Your Business |
| PYC | Prentice, Yates, & Clark, Chartered Accountants |
| PYD | Pay Your Debt, LLC |
| PYD | Professional Yacht Deliveries |
| PYE | Protect Your Eyes screen savers |
| PYO | Pick Your Own |