Several pioneer companies of the personal computer industry were listed in the credits as providing technical support. Some are still around (as of 2010) but many have disappeared. They include, Apple Computer, Autodesk, Bytec Comterm, Inc., Computer Components Unlimited, Commodore Business Machines, Heath/Zenith Data Systems, CTT Data Systems, Heath Co., Dale Wilson / Code Right, GRiD Systems Corporation, Hitachi America, Inc., Interlisp, Microbot, Inc., Magnavox Co., Mattel Electronics, Photonics Technology, RadioShack, Action Computer Enterprises, Inc, Televideo Systems, Inc., Atari home computer division (makers of Atari 8-bit family), Paul Lutus, Proton Corporation, Tycom Corporation, Office Systems by Xerox Corp and Xerox Electro-Optical Company.