AT> (CGM) A standard file formAT for storage and communicATion of graphical informATion, widely used on personal computers and accepted by {desktop publishing} and technical illustrATion systems. MIME type: image/cgm. ANSI/ISO 8632-1987. Worked on by the ISO/IEC group JTC1/SC24. CGM Open Consortium . See also: WebCGM. (1999-02-16)