| Microsoft Windows NT Setup Installation Format | |
| Microsoft | |
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SIF is a system setting file that stores information used during software installation process. SIF file holds information regarding target path, display resolution, or network settings.
SIF files were commonly used by Windows XP during automated CD-ROM mounting process. Missing or corrupted SIF file could prevent installation of software.
| .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 |