Many of the alleged flying saucer photographs of the era are now believed to be hoaxes. The flying saucer is now considered largely an icon of the 1950s and of B movies in particular, and is a popular subject in comic science fiction.[from wikipedia]

At present, there are two main types of robots, based on their use: general-purpose autonomous robots and dedicated robots. Robots can be classified by their specificity of purpose. A robot might be designed to perform one particular task extremely well, or a range of tasks less well. All robots by their nature can be re-programmed to behave differently, but some are limited by their physical form. For example, a factory robot arm can perform jobs such as cutting, welding, gluing, or acting as a fairground ride, while a pick-and-place robot can only populate printed circuit boards.[from wikipedia]