| FBB Initialization | |
| N/A | |
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SRV is a very old file format associated with FBB Packet-radio BBS application, which was very popular in during the MS-DOS era. The application allowed users to establish radio connections using BBS servers.
Files with SRV extensions store program initialization settings. FBB Packet-radio was also released for 16-bit versions of Linux systems. Since 2018 the application in no longer officially available.
Windows
| .a2theme | Aston 2 Theme Format |
| .acb | Adobe Color Book Format |
| .acbl | Adobe Color Book Format |
| .aco | Adobe Photoshop Color Palette And Swatches Format |
| .acrobatsecuritysettings | Adobe Acrobat Security Settings Format |
| .acrodata | Adobe Acrobat Data Format |
| .acv | Adobe Photoshop Colour Curves Format |
| .acw | Microsoft Accessibility Wizard Format |