CPK (Corey,Pauling,Koltun) is a popular color convention for distinguishing atoms of different chemical elements in molecular models.

See also

The CIP (Cahn-Ingold-Prelog) system is rule-based method used in organic chemistry to name the stereoisomers of a molecule. The CIP system assigns an R or S descriptor to each stereocenter and an E or Z descriptor to each double bond so that the configuration of the entire molecule can be specified uniquely.
Scalable Vector Graphics (SVG) is a family of specifications of an XML-based file format for describing two-dimensional vector graphics.
raster image
Raster graphics represents of images as an array of pixel or points of color.
vector image
Vector graphics represent images using geometrical primitives such as points, lines, curves, and shapes or polygon(s), which are all based on mathematical equations.