| webtest | Fiddler Saved WebTest Data |
| webx | Akamix Saved Search Data |
| weg | PTV VISSIM Path Data |
| weights | SAM Sequence Weights Data |
| wel | MODFLOW Well Package |
| wel | Heliosoft Seismaster Input Well Path |
| wells | ParFlow Well Output Data |
| wenlin | Wenlin Software Data |
| wes | WE7000 Control Software Setup Data |
| wf4 | PTC Creo Parametric Symbol Data |
| wff | Dataplore Wavelet Filter |
| wff | FRAMES Water Flux File |
| wfi | Agilent Infiniium Oscilloscope Waveform Data |
| wfindex | Adobe Photoshop Lightroom Index Data |
| wfl | Ultimus Workflow Suite Process Data |
| wfm | Tektronix Oscilloscope Waveform Data |
| wfmx | Tektronix AWG70000A Series Waveform Data |
| wfn | AIM Traditional Wavefunction Data |
| wfr | EMSE Wireframe Data |
| wft | Nicolet DSO Exported Data |
| wft | Oracle Workflow Process Definition |
| wfu | Molpro Permanent Wave-function Data |
| wfv | DataSet Vision Query Report |
| wfx | AIM Extended Wavefunction Data |
| wgc | WGCheck Data |
| wgl | Waveform Generation Language Data |
| wgn | SWAT Weather Generator Input Data |
| wgq | WackGet Queue Data |
| wgs | RichFX Walk-Graph Segment |
| wgt | SPSD/M WGT Data |
| wgx | WatchGuard IPSec Mobile VPN Client Certificate Data |
| wh2 | Clear Creek Solutions Project Data |
| whf | Wing Helper Design Document |
| whp | FullProf Williamson-Hall Plot Data |
| whr | SAP R/3 Tablesplitting Query Data |