These file extensions, which stand for ‘static induction transistor’, fall in the category of compressed files and are quite common. Smith Stuffit software runs these compressed files, since their formatting is suitable for use on the Macintosh systems. One can create the SIT files and open them using the platforms for both Windows and Macintosh.

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The 3GP file extension identifies a multimedia format created by Third Generation Partnership Project (3GPP). This multimedia format is normally used on Third Generation mobile phones but can also be used on some 4G and 2G mobile phones. The 3GP format is a simplified edition of MPEG-4 Part 14 (MP4) container format.

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Widget is a very small program, which enables a person store files on the desktop. These files do not come as a package from the computer manufacturer; instead, a person has to download it from Yahoo!

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Anyone who has handled graphic images will already be familiar with QIF, which stands for Graphics Interchange Format. QIF files are widely renowned for compression of data in addition to images.

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This file function transfers greyscale bitmap images. Its author is Jeff Ponskanzer. PGM files also serve as intermediary storage alternatives for conversion of other file formats.

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