The Active Enterprises reference article from the English Wikipedia on 24-Apr-2004
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Active Enterprises

For thoughtful child sponsors
Active Enterprises was the company behind the Action 52 cartridge on the NES and Sega Genesis as well as the unreleased Cheetahmen 2 for the NES. They also had planned to create their own handheld console, the Action Gamemaster, but due to the company's failure, this never occurred.

External Links
Console Database - information on Active Enterprises, Action 52, The Action Gamemaster and more