| Abbreviation | Definition |
|---|---|
| XBM | Barcode Image format |
| XBM | X Window 1-bit text BitMap graphics |
| XC | Constant image of X server screen Bitmap graphics |
| XCD | WarpIN Configuration/Installation Distribution File |
| XCK | Extended crack file (usually text) |
| XCL | Xtree for Windows Script file |
| XDB | XBase file |
| XDF | Extended disk format image |
| XEX | Renamed .EXE File |
| XFDF | Adobe Acrobat Forms Document |
| XFI | LaTex Figures File |
| XFM | Adobe Audition Transform Effect file |
| XFN | Xerox 404 Printer font ( Ventura Publisher) |
| XFR | Ventura Publisher Bitmap editor font file |
| XFS | eRacer Sound File |
| XFS | Softnyx Gunbound file |
| XFT | ChiWriter 24 pin printer font |
| XFX | Fax File |
| XG0 | Database Index |
| XG1 | Database Index |