| xhd | HappyFish Data |
| xhf | NxOgre HeightField Data |
| xhn | EASE 4.0 ASCII Speaker Data |
| xhp | OpenOffice.org XML Help |
| xic | DIF Freedom Data |
| xid | Visual Localize XML Import Definition |
| xif | LonMark Device Interface Data |
| xif | LonWorks Device Interface File |
| ximp | XOS Digital Export Package |
| xip | HP 95LX Execute-in-Place Program |
| xip | Photo Mechanic Metadata File |
| xir | XML Intermediate Representation Data |
| xit | SpatialAnalyzer Data |
| xit64 | SpatialAnalyzer Data |
| xix | Microsoft IIS NNTP Subject Lists |
| xjf | OmniPage BatchManager Job |
| xjsw | Tarsia Puzzle Data |
| xkb | X Keyboard Extension Data |
| xkm | X Keyboard Compiled Keymap Data |
| xkp | X-Keys Pro Data |
| xkt | Keysight Calibration Kit Data |
| xl2 | XL2 Analyzer Data |
| xl2r | XL2 Analyzer Data |
| xla5 | Microsoft Excel 5 for Mac Add-in |
| xlamenx | Egis Encrypted Excel XLAM Document |
| xlb4 | Microsoft Excel 4 for Mac Toolbars Data |
| xlb5 | Microsoft Excel 5 for Mac Toolbars Data |
| xlb8 | Microsoft Excel 98 for Mac Toolbar Setup |
| xlbn | Microsoft Excel for Mac Toolbar Setup |
| xldb | XLerator Database |
