From Wikipedia (Watson (artificial intelligence software))
Watson is an artificial intelligence program developed by IBM, designed to answer questions posed in natural language. Named for IBM’s initiator, Thomas J. Watson, Watson is being developed as part of IBM’s DeepQA research project. The program operates on POWER7 processor-based systems.
In 2011, Watson competed on the television quiz show Jeopardy! as a test of its abilities. In a two-game, combined-point match broadcast in three Jeopardy! episodes broadcast from February 14–16, Watson bested Brad Rutter, the biggest all-time money winner on Jeopardy!, and Ken Jennings, the record holder for the longest championship series. Watson received the first prize of $1 million, while Ken Jennings and Brad Rutter received $300,000 and $200,000, respectively. Jennings and Rutter pledged to donate half their winnings to charity, while IBM divided Watson’s winnings between two charities. This was the first human-versus-machine competition in Jeopardy!’s history.
In the match, all contestants, including Watson, had to wait until the host spoke each clue entirely, then a light was lit as a signal; the first to activate their buzzer button won the chance to answer. Watson typically activated its button faster, and only had trouble answering a few categories, such as clues for the names of keys on a typical computer keyboard, or recent events. For each clue, Watson’s 3 most probable answers were displayed by the television screen. Watson had access to 200 million pages of structured and unstructured content consuming four terabytes of hard disk storage, including the full text of Wikipedia. Watson was not connected to the Internet during the game.
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