| File Extension: | HLD |
| File Type Description: | Structural Desktop |
| File Type Developer: | Autodesk, Inc. |
| Primary Associated Software: | Autodesk AutoCAD |
| Primary Software Developer: | Autodesk, Inc. |
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Structural Desktop files are the most popular type of files to carry the HLD file extension, originally developed by Autodesk, Inc. for Autodesk AutoCAD. Our internal web tracking data indicates that Windows 10 operating system users, and those living in United States, are the most likely to use Structural Desktop files. Statisically, these users are most likely running the Google Chrome internet browser.
 | Autodesk AutoCAD by Autodesk, Inc. |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | iOS |
 | Android |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .SBP | Autodesk, Inc. | Raster Image Files | Sketchbook Express iCloud Image |
| .PSP | Corel Corporation | Raster Image Files | PaintShop Pro Image |
| .VRT | Superscape | Web Files | Virtual World |
| .ACB | Adobe Systems Incorporated | Settings Files | Adobe Photoshop Color Book File |
| .BK1 | Autodesk, Inc. | Backup Files | Autodesk Backup File |
| .3DA | Unknown Developer | 3D Image Files | 3D Assembly File |
| .IFC | buildingSMART | 3D Image Files | Industry Foundation Classes File |
| .PAT | Autodesk, Inc. | CAD Files | AutoCAD Hatch Pattern File |
| .PCB | Autodesk, Inc. | Data Files | Printed Circuit Board Design File |
| .MWF | Autodesk, Inc. | Data Files | MapGuide Author Map Window File |
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