About the Author

Michael Brady is Senior Research Scientist at MIT's Artifical Intelligence Laboratory. John Hollerbach is an Associate Professor in the MIT Department of Brain and Cognitive Sciences and the MIT Artificial Intelligence Laboratory. Tomás Lozano-Pérez, is a Professor in the Electrical Engineering and Computer Science Department and Associate Director of the Artificial Intelligence Laboratory at the Massachusetts Institute of Technology. Matthew T. Mason is Professor of Computer Science and Robotics at Carnegie Mellon University.