Robotics

Robotics brings together engineering and computing to create machines that sense, move and act in the physical world. In the vocabulary used by the International Federation of Robotics, drawing on ISO 8373, a robot is a programmed, actuated mechanism with some degree of autonomy for locomotion, manipulation or positioning. This broad idea covers very different devices: an industrial arm fixed beside a production line, a mobile robot moving through a building, or a remotely operated machine in a hazardous or distant setting. Robots do not need to resemble people. Robotics overlaps with automation, but it is not synonymous with artificial intelligence: a robot may use AI for perception or planning, while many robots perform specialized tasks without general-purpose intelligence.

Although designs vary, many robots combine a mechanical structure, sensors, actuators, a control system and a power source. Sensors measure features of the machine or its surroundings; a controller processes those measurements and sends commands to actuators, which produce movement or other physical action. A robot's capabilities depend on how these parts work together, not on any one component alone. For example, a mobile robot must estimate where it is, interpret relevant surroundings and control its movement. More capable systems may update plans as conditions change, but sensing and decision-making remain limited by the task, available data and the physical environment.

Industrial manipulators are used for repetitive operations such as handling, welding, assembly and inspection. Mobile robots can transport materials or navigate environments; service and research robots are designed for settings beyond conventional factory work. The boundaries are not always sharp, and specialized machines may combine mobility with manipulation. NASA, for instance, uses robotic systems to explore planets and other objects in the Solar System, assist astronauts on the International Space Station and study the universe. Robots can take on work that is repetitive, physically difficult, hazardous or too distant for people to perform directly, although each system is designed for particular tasks rather than being a universal worker.

Mechanical automata and imagined artificial beings long predate modern robotics, but the word robot entered modern usage through Karel Čapek's 1920 play R.U.R. It derives from the Czech word robota, meaning forced labour or drudgery. The practical field developed through advances in programmable machinery, electronics and control. A landmark in industrial use was Unimate: the machine was installed at a General Motors plant in Trenton, New Jersey, in 1961 to unload a die-casting press. It performed a narrow, demanding task, illustrating how early industrial robots were engineered for repeatable work rather than human-like versatility.

Robots range from systems that repeat programmed motions to mobile platforms that make some decisions from sensor data; others are operated or supervised remotely. Autonomy is therefore a matter of degree and task, not an all-or-nothing label. When a robot shares space with people or works in an unpredictable environment, developers must test how it senses, moves, responds to faults and performs as an integrated system. The U.S. National Institute of Standards and Technology develops measurement methods and performance tests for robotics, including safety, perception, mobility and human–robot interaction. These concerns matter because a machine that succeeds in a controlled demonstration may still need validation for the specific conditions in which it will be used.

1920: Karel Čapek's play R.U.R. introduces the word robot into modern usage. 1961: A Unimate robot is installed on a General Motors assembly line in New Jersey to unload a die-casting press. 2021: ISO publishes the third edition of ISO 8373, a vocabulary standard for robotics.