The 1998 ACM Computing Classification System — Association for Computing MachineryThe full classification scheme involves three concepts (described more fully in the Introduction): the four-level tree (containing three coded levels and a fourth uncoded level), General Terms, and implicit subject descriptors. (See also the Report of the CCS Update Committee (pdf)). For information on how to classify works using the CCS, see How to Classify Works Using ACM's Computing Classificat
