| Microsoft Windows OpenGL Installable Client Driver Format | |
| Microsoft | |
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ICD files are responsible for communication processes between Microsoft Windows operating system and device abstraction layer. ICD document files store OpenGL pipeline settings for high-end graphics card.
ICD files require that Microsoft DirectX be installed on user’s system. Issues with this type of file may be rectified by updating or reinstalling it. OpenGL driver is responsible for properly displaying 2D and 3D graphics.
| .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 |