Service robots assist human beings, typically by performing a job that is dirty, dull, distant, dangerous or repetitive, including household chores. They typically are autonomous and/or operated by a built-in control system, with manual override options. The term "service robot" does not have a strict technical definition. The International Federation of Robotics (IFR) has proposed a tentative definition: "A service robot is a robot which operates semi- or fully autonomously to perform services useful to the well-being of humans and equipment, excluding manufacturing operations." The possible applications of robots to assist in human chores is widespread. At present there are a few main categories that these robots fall into: Industrial Service, Domestic Service and Scientific.