Autodesk Inc, Sausalito, California has signed to incorporate Emeryville, California-based Ithaca Software Inc’s Hoops Graphics System into AutoCAD to enhance three-dimensional graphics performance, and has taken 20% of the company: Hoops is a database optimised for producing three-dimensional graphics across a wide range of personal computers and workstations and designed to be used by software makers to develop highly interactive scientific, engineering and business applications; no terms were given.