| WPI | Wales Programme for Improvement 
| Others |
| WPI | Washington Pattern Jury Instructions: Civil
| Others |
| WPI | Water Partners International
| Others |
| WPI | Watson Pharmaceuticals Inc
| Others |
| WPI | Waukesha- Pearce Industries, Inc.
| Others |
| WPI | WCPUID Plug in
| Others |
| WPI | Weather Protected Type I
| Others |
| WPI | Web Page Identification
| Others |
| WPI | Web Price Index
| Others |
| WPI | Web Printing Interface
| Others |
| WPI | Wellness Prevention Intervention
| Others |
| WPI | Whey Protein Isolate
| Others |
| WPI | Whey Protein Isolates
| Others |
| WPI | Wholesale Price Index
| Others |
| WPI | Windows Platform Installer
| Others |
| WPI | Windows Post Install
| Others |
| WPI | Winning Percentage Index
| Others |
| WPI | Wire- Pro, Inc.
| Others |
| WPI | Wisconsin Pain Initiative
| Others |
| WPI | With Permission of Instructor
| Others |
| WPI | With Provision for Issue
| Others |
| WPI | Wolverine Pullers Inc.
| Others |
| WPI | Women & Politics Institute
| Others |
| WPI | Worcester Polytechnic Inst
| Others |
| WPI | Worcester Polytechnic Institute
| Others |
| WPI | Work Process Indicator
| Others |
| WPI | Work Progress Indicator
| Others |
| WPI | World Policy Institute
| Others |
| WPI | World Precision Instruments
| Others |
| WPI | World Premier International
| Others |
| WPI | World Press Institute
| Others |
| WPI | World Products, Inc.
| Others |
| WPI | Wraps Per Inch
| Others |