IBM's Watsonartificial intelligence program wins on the U.S. quiz show "Jeopardy!", defeating Brad Rutter and Ken Jennings, the series' most successful contestants. [https:--www.pcmag.com-article2-0,2817,2380489,00.asp?kc=PCRSS03069TX1K0001121 (PC Mag)] "Watson" used Wikipedia, among other sources, as its knowledge base. "[https:--web.archive.org-web-20121021042319-http:--www.vancouversun.com-entertainment-Watson+computer+Ottawa+roots-4290481-story.html (The Vancouver Sun)]" "[https:--www.npr.org-2011-02-11-133686004-IBM-Computer-Faces-Off-Against-Jeopardy-Champs (NPR)]" "[http:--www.ibm.com-ibm100-us-en-icons-watson- (IBM)]"