Computer Graphics Metafile (CGM) is free, platform-independent, international standard metafile format for storing and exchanging vector graphics (2D), raster graphics, and text. CGM uses an object-oriented approach and many function provisions for image production. CGM uses these object-oriented characteristics for remolding graphical elements to render an image. A metafile contains necessary information that defines other files. In CGM, a text-based source file contains all graphical elements that can be later compiled into a binary file.
XLAM files are used to extend the modules provided by Excel. They can be added to Excel 2007 or later, or to earlier versions of Excel with Open XML component support. File used by Microsoft Excel, a program that allows users to create and edit spreadsheets; contains a macro-enabled add-in, which provides extra functionality and tools that may execute macros.
You can also convert CGM into many other file formats. Please see the complete list below.