For "Oliver & Company", Disney invested $15 million into a long-term computer system called Computer Animation Production System, otherwise known as CAPS. Unlike "The Black Cauldron" and "The Great Mouse Detective", which used computer imagery for special sequences, 11 minutes of "Oliver & Company" were computer-generated such as the skyscrapers, the taxi cabs, trains, Fagin's scooter-cart, and the climactic subway chase.