| File Extension: | PDU |
| File Type Description: | Protocol Data Unit Message |
| File Type Developer: | Unknown Developer |
| Primary Associated Software: | Apple TextEdit |
| Primary Software Developer: | Apple |
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Protocol Data Unit Message files were originally developed by Apple for the Apple TextEdit software application. Our internal web tracking data indicates that Windows 10 operating system users, and those living in China, are the most likely to use Protocol Data Unit Message files. Most of these users are running the Google Chrome web browser.
 | Apple TextEdit by Apple |
 | Dimenzo Text Editor by Dimenzo, Inc. |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Mac |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .DVX | DivX, LLC. | Video Files | DivX Video File |
| .MID | Open Source | Audio Files | MIDI Audio File |
| .PKG | Apple | Compressed Files | Apple MacOS Installer Package |
| .KCL | Nintendo | Game Files | Mario Kart Collision File |
| .NFO | Microsoft Corporation | System Files | System Information File |
| .WS | MicroPro International Corp. | Text Files | WordStar Document |
| .LARGE | Apple | Data Files | Golden Orchard Apple II CD Rom File |
| .PAC | NetScape | Web Files | Proxy Auto-Config File |
| .RMVB | RealNetworks | Video Files | RealMedia Variable Bit Rate File |
| .SDP | Oracle Corporation | Data Files | StarOffice Presentation File |
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