What is a mmc file and how do I open a mmc file?

The Microsoft Media Catalog is stored in the MMC format and is affixed with MMC extension and is used by Microsoft Clip Gallery. These MMC files are generally classified as data files that contain image collection in an organized format similar to a clipart gallery. These files are saved in the Application DataMicrosoftMedia Catalog directory. One example of an MMC file is the "Artgal50.mmc" catalog file that contains images, keywords, and thumbnail previews used by Clip Gallery. The Microsoft Clip Gallery software application allows user to preview clip art, photos, bitmaps, scanned images, drawings and other graphics, sound effects, music, videos, animated Graphics Interchange Format (GIF) pictures, and other clips and insert them in Microsoft Office documents. It features browser-like user interface, drag and drop clip organizing, and automatic Clip gallery access from the Start Menu. The Microsoft Clip Gallery software can be used in Microsoft Windows based systems to access and view MMC files.  

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