The only thing this family of companies has in common is the Duchossois family, the third-generation owners of The Duchossois Group, Inc. The holding company, pronounced "deshy-swa," focuses its investment interests in the consumer products, technology and services sectors. The Chamberlain Group, a subsidiary, is the world's top maker of residential and commercial door openers and a leading maker of access control products. AMX performs systems integration, while other companies offer AV equipment, Internet-based access control, and lighting products. The Duchossois Group also owns an early-stage IT venture capital fund and holds a minority stake in horse racetrack Churchill Downs.