| File Extension: | NCH |
| File Type Description: | On Hold Message/Music File |
| File Type Developer: | Microsoft Corporation |
| Primary Associated Software: | Microsoft Outlook Express |
| Primary Software Developer: | Microsoft Corporation |
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Release of the Microsoft Outlook Express software program prompted the development of the On Hold Message/Music File file type by Microsoft Corporation. Commonly, On Hold Message/Music File files are found on user computers from United States, and on PCs running the Windows 10 operating system. Google Chrome is the predominant internet browser used by this population.
 | Microsoft Outlook Express by Microsoft Corporation |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .U | Epic Games | Game Files | Unreal Tournament Class Package |
| .MMT | Open Source | Compressed Files | Nimbus 7 SAMS Data File |
| .BND | IBM | Uncommon Files | DB2 CLI Bind File |
| .VHDX | Microsoft Corporation | Disk Image Files | Windows 8 Virtual Hard Drive File |
| .BDR | Microsoft Corporation | Text Files | Exchange Non-Delivery Report Body File |
| .BFC | Microsoft Corporation | Uncommon Files | Windows Briefcase File |
| .MTT | Digital Confidence | Data Files | MetadataTouch Template |
| .HWPROJ | Microsoft Corporation | Developer Files | Visual Studio .NET Help Project |
| .M1A | Open Source | Audio Files | MPEG-1 Audio File |
| .DL_ | Microsoft Corporation | Compressed Files | Compressed DLL File |
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