The Aerospace Robotics Laboratory (ARL), operated at Stanford University, focuses its research "on improving robotic performance through the application of feedback control, integrated sensing systems, and task-level autonomy." The systems designed at ARL allow the human operator to have varying levels of control over the robot. Specifically, the robot performs given tasks until it reaches a point that it can not perform on its own. The human can then intervene and direct the robot manually. A comprehensive list of all ARL publications is available on the Web site, ranging from the 1960's to 2002 (many of the publications after 1990 are available for download). There are even movies of laboratory experiments and demonstrations that can be downloaded and viewed. The Projects section explains the various research projects currently underway.