"Jeopardy!" contest Ken Jennings, who won a record 74 consecutive games, refers to his opponent, an IBM computer called "Watson", while being interviewed after a practice round of the "Jeopardy!" quiz show in Yorktown Heights, N.Y., Thursday, Jan. 13, 2011. It's the size of 10 refrigerators, and it swallows encyclopedias whole, but an IBM computer was lacking one thing it needed to battle the greatest champions from the "Jeopardy!" quiz TV show - it couldn't hit a buzzer. But that's been fixed, and on Thursday the hardware and software system named Watson played a competitive practice round against two champions. A "Jeopardy!" show featuring the computer will air in mid-February, 2011. (AP Photo/Seth Wenig)
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