| File Extension: | A4P |
| File Type Description: | A4Desk Pro Project File |
| File Type Developer: | Avanquest Software |
| Primary Associated Software: | Avanquest A4Desk Pro |
| Primary Software Developer: | Avanquest Software |
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Adobe Systems Incorporated developed the A4Desk Pro Project File file type when the Adobe Authorware was initially released. Annoymous user data statistics infer that A4P files are most popular in China and with those using Windows 10 devices. Most of these users are running the Google Chrome web browser.
 | Avanquest A4Desk Pro by Avanquest Software |
 | Adobe Authorware by Adobe Systems Incorporated |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .ARK | Avanquest Software | Compressed Files | PowerDesk Pro Archive |
| .SWK | Avanquest Software | Data Files | StudyWorks Save File |
| .FSIF | Avanquest Software | Data Files | MyLabel Designer Deluxe Data File |
| .MSIF | Avanquest Software | Data Files | MyLabel Designer Deluxe Data File |
| .MLB | Avanquest Software | Data Files | MyLabel Designer Deluxe Project File |
| .DJR | Avanquest Software | Audio Files | Ringtone Media Studio DJ Ringtone Project |
| .PHB | Motorola | Data Files | Motorola Phone Book File |
| .MYL | Avanquest Software | Raster Image Files | MyLogo Maker Image |
| .MLD | FMJ-Software | Audio Files | I-Melody Format For I-Mode |
| .JSB | Freedom Scientific | Developer Files | JAWS Script Binary File |
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