| File Extension: | B4S |
| File Type Description: | Winamp Playlist File |
| File Type Developer: | Nullsoft |
| Primary Associated Software: | Nullsoft Winamp |
| Primary Software Developer: | Nullsoft |
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Release of the Nullsoft Winamp software program prompted the development of the Winamp Playlist File file type by Nullsoft. Internal website statistics show that B4S files are most popular with users in United States and those running the Windows 10 operating system. A high percentage of these users browse the web using Google Chrome.
 | Nullsoft Winamp by Nullsoft |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Android |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .WLZ | Gilles Vollant | Disk Image Files | WinImage Compressed Disk Image |
| .MINIUSF | Nintendo | Audio Files | Nintendo 64 Song File |
| .MTM | VideoLAN | Audio Files | MultiTracker Module |
| .NSA | Nullsoft | Audio Files | Nullsoft Streaming Audio File |
| .OPUS | Open Source | Audio Files | Opus Audio File |
| .LA | Open Source | Audio Files | Lossless Audio File |
| .AVI | Microsoft Corporation | Video Files | Audio Video Interleave File |
| .MTK | Nullsoft | Audio Files | MPU-401 Trakker File |
| .YM | Atari Corporation | Audio Files | Atari ST Audio File |
| .M3U | Nullsoft | Audio Files | Media Playlist File |
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