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.
Liar! (short story)
"Liar!" is a science fiction short story by American writer Isaac Asimov. It first appeared in the May 1941 issue of "Astounding Science Fiction" and was reprinted in the collections "I, Robot" (1950) and "The Complete Robot" (1982). It was Asimov's third published positronic robot story. Although the word "robot" was introduced to the public by Czech writer Karel Čapek in his 1920 play "R.U.R." (Rossum's Universal Robots), Asimov's story "Liar!" contains the first recorded use of the word "robotics" according to the "Oxford English Dictionary". The events of this short story are also mentioned in the novel "The Robots of Dawn" written by the same author.