| 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 Japan 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 |
|---|---|---|---|
| .STP | Unknown Developer | 3D Image Files | STEP 3D CAD File |
| .EXL | SysTools Solutions | Data Files | Export Lister File |
| .MP | Autodesk, Inc. | 3D Image Files | Maya PLE Project File |
| .HIA | PHD Computer Consultants | 3D Image Files | Spy-CD Database |
| .PL4 | Corel | 3D Image Files | Micrografx Designer Palette |
| .HX | Thermo Fisher Scientific Inc. | 3D Image Files | Amira 3D Mesh File |
| .BDF | Willowsoft Creek Software | Backup Files | Backup Definition File |
| .MHX | Fujitsu Limited | Data Files | Fujitsu MicroController Firmware |
| .ATM | E-on Software, Inc. | 3D Image Files | Vue Atmospheres File |
| .GLM | Raven software | 3D Image Files | Ghoul 2 Model File |
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