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
The term "robot" was first used in a play published by the Czech Karel Čapek in 1920. "R.U.R." (Rossum's Universal Robots) was a satire, robots were manufactured biological beings that performed all unpleasant manual labor. According to Čapek, the word was created by his brother Josef from the Czech "robota", meaning servitude. The play "R.U.R," replaced the popular use of the word "automaton". However, until the 1950s "robot" was pronounced "robit" in films, radio and television programs: examples are "The Lonely" episode of the TV series "The Twilight Zone", first aired on 15 November 1959, and the sci-fi radio program "X Minus One".