There are a few terms specific to mobile robots that must be defined to avoid confusion. First, the term robot itself has unfortunately come to have at least three different meanings. In this book, the word robot means an autonomous or semi-autonomous mobile land vehicle that may or may not have a manipulator or other device for affecting its environ- ment. Colin Angle, CEO of iRobot Corp. defines a robot as a mobile thing with sensors that looks at those sensors and decides on its own what actions to take
