CGM - Computer Graphics Metafile is a file extension that includes vector graphics which are created for supporting graphic programs. They are also used for clip arts and much more. They are also based on newer revisions as well. Once you download this extension, you will be able to benefit from different files that are encoded using different methods. You can also use standard file encoding which allows software programs to read the file faster and efficiently. The extension allows for more possible file size as well as saving a lot more disk space. Data transfers have also been made a lot easier with this extension.