Early in the company's history, it worked with the American Systems Corporation under a contract from the Naval Air Warfare Center Training Systems Division (NAWCTSD) to replace naval training videos for aircraft launch operations with interactive 3D computer simulations featuring characters made with DI-Guy, software for realistic human simulation.[6] Eventually the company started making physical robots—for example, BigDog was a quadruped robot designed for the U.S. military with funding from Defense Advanced Research Projects Agency (DARPA)