| File Extension: | SIG |
| File Type Description: | Signature File |
| File Type Developer: | Unknown Developer |
| Primary Associated Software: | Microsoft Outlook Express |
| Primary Software Developer: | Microsoft Corporation |
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Signature File files were originally developed by Microsoft Corporation for the Microsoft Outlook software application. Our data shows that SIG files are frequently utilized by PC users in China and popular on the Windows 10 platform. A high percentage of these users browse the web using Google Chrome.
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | iOS |
 | Android |
 | Windows Phone |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .OPX | Insperity Business Services | Data Files | OrgPlus Organizational Chart |
| .W40 | Microsoft Corporation | Backup Files | Windows 95 Backup File |
| .GCSX | Microsoft Corporation | Settings Files | Microsoft Office SmartArt Color File |
| .BTF | Bank of America | Data Files | NationsBank Check Images |
| .WS2 | MicroPro International Corp. | Text Files | WordStar Document |
| .DDE | ABBYY | Data Files | File TypeLingvo Dictionary Error Log File |
| .MSD | ESRI | GIS Files | Map Service Definition File |
| .SHTML | Sublime HQ Pty Ltd | Web Files | Server Side Include HTML File |
| .VSW | Microsoft Corporation | Settings Files | Visio Workspace File |
| .SLDM | Microsoft Corporation | Uncommon Files | Microsoft PowerPoint Macro-enabled Open XML Slide |
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