| Acronym | Definition |
|---|
| PWI | Pro Wrestling Illustrated (magazine) |
| PWI | Pro Wrestling Iron |
| PWI | Perfusion-Weighted Imaging (application of magnetic resonance imaging) |
| PWI | Projects with Industry |
| PWI | Penson Worldwide, Inc. (various locations) |
| PWI | Permanent Way Institution |
| PWI | Produced Water Injection (oilfield technology) |
| PWI | Perfect World International (gaming) |
| PWI | Pacific WebWorks, Inc. (Salt Lake City, UT) |
| PWI | Partnerships with Industry (San Diego, CA) |
| PWI | Parenting with Intention |
| PWI | Panhandle Windstorm Inspections (Tallahassee, FL) |
| PWI | Posting While Intoxicated |
| PWI | Predominantly-White Institution |
| PWI | Public Windows Interface |
| PWI | Public Waters Inventory |
| PWI | Piedmont Wilderness Institute (South Carolina) |
| PWI | Pure Worldwide Internet |
| PWI | Proximity Warning Indicator (aviation) |
| PWI | Power Indication |
| PWI | People Web International (est. 2009) |
| PWI | Picasa Webalbum Integrator (web tool) |
| PWI | Pacific Wellness Institute (Toronto, ON, Canada) |
| PWI | Polar Plasma Wave Investigation |
| PWI | ProcessWise Integrator |
| PWI | Primarily White Institution |
| PWI | Potable Water Intake |
| PWI | EO Paton Electric Welding Institute (Kiev, Ukraine) |
| PWI | Process Work Instruction |
| PWI | Pilot Warning Indicator |
| PWI | Plutonium Waste Incinerator (SRS) |
| PWI | ProWrestling Insider |
| PWI | Paid When Incurred |
| PWI | Pulse-Width Inspection |
| PWI | Product Waste Indicator |