| File Extension: | P21 |
| File Type Description: | Express STEP Data Model File |
| File Type Developer: | LKSoft |
| Primary Associated Software: | JSDAI for Eclipse |
| Primary Software Developer: | LKSoft |
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Express STEP Data Model File files are the most popular type of files to carry the P21 file extension, originally developed by LKSoft for JSDAI for Eclipse. Annoymous user data statistics infer that P21 files are most popular in United States and with those using Windows 10 devices. Most of these users are running the Google Chrome web browser.
 | JSDAI for Eclipse by LKSoft |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Linux |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .EXL | SysTools Solutions | Data Files | Export Lister File |
| .STP | Unknown Developer | 3D Image Files | STEP 3D CAD File |
| .MQO | tetraface Inc. | 3D Image Files | Metasequoia Document |
| .IGS | United States Air Force | CAD Files | Initial Graphics Exchange Specification Drawing File |
| .3DV | Web3D Consortium | 3D Image Files | 3D VRML World |
| .DBC | Microsoft Corporation | Database Files | FoxPro Database File |
| .ASC | Symantec Corporation | Encoded Files | PGP (Pretty Good Privacy) ASCII Armored File |
| .OBJ | Wavefront Technologies | 3D Image Files | Wavefront 3D Object File |
| .DMC | nModal Solutions Inc. | Data Files | Datamartist Data Canvas File |
| .FAQ | The Document Foundation | 3D Image Files | Frequently Asked Questions Document |
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