Audio-Animatronics (Animatronics, AA) is the registered trademark for a form of robotics animation created by Walt Disney Imagineering for shows and attractions at Disney theme parks, and subsequently expanded on and used by other companies. The robots move and make noise (generally a recorded speech or song), but are fixed to whatever supports them. They can sit and stand but cannot walk. An Audio-Animatron is different from an android-type robot in that it uses prerecorded movements and sounds, rather than responding to external stimuli.