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"IBM and Jeopardy! Relive History with Encore Presentation of Jeopardy!: The IBM Challenge
Episodes to Air September 12, 13, 14 at Local Times"
By: Robert MacFarlan.
Citing IBM Press Release - http://www-03.ibm.com/press/us/en/pressrelease/35301.wss.
Watson is a POWER7-based cluster running the Linux operating system. 
