Analog robot
An analog robot is a type of robot which uses analog circuitry to go toward a simple goal such as finding more light or responding to sound. The first real analog robot was invented in the 1940s by William Grey Walter. The name of these robots were ELSIE and ELMER (Electro Mechanical Robot). The original circuitry was developed using two vacuum tubes and a photocell to search and follow a light. Recently a kind of analog robots was developed by Mark Tilden.
History of robots
In 1941 and 1942, Isaac Asimov formulated the Three Laws of Robotics, and in the process coined the word "robotics". In 1945 Vannevar Bush published As We May Think, an essay that investigated the potential of electronic data processing. He predicted the rise of computers, digital word processors, voice recognition and machine translation. He was later credited by Ted Nelson, the inventor of hypertext. In 1948, Norbert Wiener formulated the principles of cybernetics, the basis of practical robotics.