The National Archives
Search our website
  • Search our website
  • Search our records
Image of software box and CD PRONOM
Welcome (PRONOM  home page) About PRONOM Add an entry
Search Help - opens in a new window Information resources - opens in a new window

*Details: File format summary



Search by keyword Search by file format Search by PUID Search by software Search by vendor Search by lifecycles Search by Migration Pathway

Details for:

Save as... XML | CSV Printer friendly version


Name Computer Graphics Metafile ASCII
Version 1
Other names  
Identifiers MIME:  image/cgm
PUID:  x-fmt/142
Classification Image (Raster), Image (Vector), Text (Structured)
Description Computer Graphics Metafile (CGM) is a standardized platform-independent format used for the interchange of raster and vector data. CGM was developed under the auspices of the International Standards Organization (ISO) and the American Standards National Institute (ANSI). It is also used in conjunction with a variety of input and output devices. Although CGM incorporates extensions designed to support raster data storage, files in CGM format are used primarily to store vector information. CGM files typically contain either bitmap or vector data, but rarely both. It uses Clear Text Encoding. File format specifications available at
Orientation Text
Byte order  
Related file formats None.
Technical Environment  
Supported until  
Format Risk  
Developed by None.
Supported by None.
Source Digital Preservation Department / The National Archives
Source date 02 Dec 2010
Source description File format information supplied by NARA Information Services/Applied Research Division, The National Archives and Records Administration.
Last updated 29 Nov 2011
Top of page Top of page
The National Archives Newsletter Icon

Send me The National Archives’ newsletter

A monthly round-up of news, blogs, offers and events.