Tulsa, OK April 1, 2006 -- PennWell Corporation, a diversified global media and information company, announced today that it has sold Computer Graphics World magazine to California Offset Printers, Inc. Computer Graphics World, published monthly since 1977, is the premier authority on innovative graphics technology and applications, serving over 40,000 professionals involved in advanced computing applications. The Computer Graphics World franchise also includes a web site and bi-monthly e-newsletter. Financial terms of the sale were not disclosed. With the sale of Computer Graphics World, PennWell continues to focus on its many publications, conference & exhibitions and digital media ventures in various technology and industrial sectors. "Computer Graphics World is a great fit for COP Communications which is an innovative group of graphics communication companies in traditional printing and publishing," according to Mark Finkelstein, Senior Vice President of PennWell's Advanced Technology Division. COP also publishes Post magazine, which serves the television, film, and video production and post production market."