| .CHM | Microsoft Corporation | Web-tiedostot | Compiled HTML Help File | SWAT | Grassland, Soil and Water Research Laboratory |
| .CST | Smith Micro Software | Sivun asettelutiedostot | Manga Studio Story File | SWAT | Grassland, Soil and Water Research Laboratory |
| .DAT | Unknown Developer | Pelitiedostot | Game Data | SWAT | Grassland, Soil and Water Research Laboratory |
| .FIG | Open Source | Vektorikuvatiedostot | Xfig Drawing | SWAT | Grassland, Soil and Water Research Laboratory |
| .GW | Grassland, Soil and Water Research Laboratory | Datatiedostot | SWAT Groundwater Input Data | SWAT | Grassland, Soil and Water Research Laboratory |
| .PCP | Microsoft Corporation | Sovelluskehittäjän tiedostot | Windows Installer Patch Creation Properties File | SWAT | Grassland, Soil and Water Research Laboratory |
| .PET | Larry Short, Mick Amadio and Puppy community | Pakatut tiedostot | Puppy Linux Install Package | SWAT | Grassland, Soil and Water Research Laboratory |
| .RCH | Grassland, Soil and Water Research Laboratory | Datatiedostot | SWAT Reach Output File | SWAT | Grassland, Soil and Water Research Laboratory |
| .RTE | Autodesk, Inc. | Datatiedostot | Revit Project Template | SWAT | Grassland, Soil and Water Research Laboratory |
| .SBS | Allegorithmic | Asetustiedostot | Substance Package | SWAT | Grassland, Soil and Water Research Laboratory |
| .SEP | PictView software | Rasterikuvatiedostot | Separated Image File | SWAT | Grassland, Soil and Water Research Laboratory |
| .TMP | Mozilla | Varmuuskopiointitiedostot | General Temporary File | SWAT | Grassland, Soil and Water Research Laboratory |
| .WGN | Grassland, Soil and Water Research Laboratory | Datatiedostot | SWAT Weather Generator Input | SWAT | Grassland, Soil and Water Research Laboratory |
| .WUS | WUSSOFT | Äänitiedostot | WUTG Tagged Audio File | SWAT | Grassland, Soil and Water Research Laboratory |
/1 
