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.
Kevin Warwick
The 1999 edition of the Guinness Book of Records recorded that Warwick performed the first robot learning experiment by Internet. One robot, with an artificial neural network brain in Reading, UK, learnt how to move around. It then taught, via the Internet, another robot in SUNY Buffalo New York State, USA, to behave the same way. The robot in the US was therefore not taught or programmed by a human, but rather by another robot based on what it itself had learnt.