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GV is a default output format for DOT language in the Graphviz Graph Visualization Software. It is used to represent graphs in a form understandable to humans and programs. GV was developed to replace the DOT extension to avoid confusion as it is also used in Microsoft Word before 2007.

This format was created by Nokia for use in its proprietary phones. A bitmap image was used to transfer image files between devices over a wireless connection. It was mainly used when exchanging multimedia text messages that support inserting pictures.