Surveys the state of the art in sensors, systems, methods, and technologies used in mobile robot navigation, detailing relative and absolute position measures including odometry; inertial navigation; active beacons; artificial and natural landmark recognition; and model matching. Compares and analyzes the different methods based on technical publications and on product and patent information, focusing on criteria including accuracy; equipment needed; cost; sampling rate; effective range; and computational power required. Includes b&w photos, and systems-at-a-glance tables. Annotation c. by Book News, Inc., Portland, Or.