Reed, Theodore N.J. L. Encarnacao2015-09-292015-09-2919811017-4656http://dx.doi.org/10.2312/eg.19811026The Common Graphics System (CGS) was developed at the Los Alamos National Laboratory. A standard device driver interface was defined for graphics device drivers and for use by user-callable graphics subroutine packages. This paper describes the existing CGS device driver interface, the experience we gained using it, and the extended interface capable of supporting more powerful graphics devices. The relationship between this interface and the CGS Metafile is also discussed.10.2312/eg.19811026