| Abbreviation | Definition |
|---|---|
| XLV | Excel VBA Module |
| XLW | Excel Workspace |
| XM | Fast Tracker 2 Extended Module - Sound File |
| XMAP | File That Controls How XML/ XSL Gets Served |
| XMB | X-Wing Mission Briefing File |
| XMD | OmniMark Source Code |
| XMF | Milnta APL Transfer Function |
| XMI | Compressed eXtended MIdi music |
| XML | XML (Extensible Markup Language) document |
| XMLDTD | eXtensible Markup Language Document Type Definition |
| XMP | Adobe Extensible Metadata Platform |
| XMS | Autodesk AutoCAD External Message |
| XMS | ViewCafT XML Markup Session |
| XMV | Milnta APL Transfer Function |
| XMX | Autodesk AutoCAD External Message Compiled File |
| XMZ | XGL Movie ( MegaView) |
| XNF | Standard Network File form |
| XNF | Xilinx Netlist Format file |
| XNK | Microsoft Outlook Shortcut file |
| XNT | Spice Pspice Library File |