Paul Allen, philanthropist and co-founder of Microsoft, died on October 15, 2018, at age 65. He died in Seattle from complications related to non-Hodgkin's lymphoma two weeks after he said he was being treated for the disease.
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Paul Allen with Bill Gates. The two founded Microsoft in 1975, several years after the they met as students at a private school in Seattle.
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Paul Allen, left, with Bill Gates at the annual PC Forum in Phoenix, Arizona in February 1987. "I am heartbroken by the passing of one of my oldest and dearest friends, Paul Allen," Gates said in a statement Monday.
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Tech journalist John Dvorak, left, with Paul Allen, center, and Esther Dyson from EDventure Holdings, right, at the annual PC Forum in Palm Springs, California in March 1989.
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Paul Allen plays acoustic guitar at the annual PC Forum in Tucson, Arizona, in March 1991, accompanied on the piano by Jerrold Kaplan of GO Corporation/Egghead.
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Microsoft co-founders Bill Gates, center, and Paul Allen, left, watch the third game of the Western Conference Finals between the Los Angeles Lakers and the Portland Trail Blazers in Portland, Oregon on May 26, 2000.
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In his later years, Paul Allen took up a number of other projects -- from the charitable to the adventurous. On June 23, 2000, he christened his Experience Music Project museum by smashing a replica Stratocaster guitar at the grand opening in Seattle, Washington.
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Allen sits courtside with Portland Trail Blazers President Bob Whitsitt, left, during the Round One Playoff Game 3 against the Los Angeles Lakers at the Rose Garden in Portland, Oregon in 2001. Allen bought two professional sports teams -- the NBA's Trail Blazers and the NFL's Seattle Seahawks -- and was involved with both until his death.
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Paul Allen, left, talks with Jeffrey Katzenberg of DreamWorks outside the Inn in the Sun Valley resort during the Allen & Co conference in Sun Valley, Idaho on July 9, 2004.
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Stuart Varney of Fox News, left, moderates a panel featuring Paul Allen, Time Warner CEO Richard Parsons, and Comcast CEO Brian Roberts in New Orleans, Louisiana on May 3, 2004.
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Portland Trail Blazers owner Paul Allen arrives at a press conference with the team's new head coach, Nate McMillan, left, and team president Steve Patterson, right, on July 7, 2005 at Washington Park in Portland, Oregon.
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Seahawks owner Paul Allen holds up the NFC Championship trophy following his team's victory over the Carolina Panthers at Qwest Stadium on January 22, 2006.
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Paul Allen, owner of the Portland Trail Blazers, center, sits with team president Larry Miller, left, and Pete Carroll, head coach of the National Football League's Seattle Seahawks, during a Blazers game against the Utah Jazz on April 18, 2012, at the Rose Garden Arena in Portland, Oregon.
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Team Owner Paul Allen of the Seattle Seahawks holds the Lombardi Trophy during ceremonies following the Super Bowl XLVIII Victory Parade at Century Link Field on February 5, 2014, in Seattle, Washington.
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President Barack Obama congratulates Seattle Seahawks owner Paul Allen during a ceremony honoring the players, coaches and executives of the Super Bowl XLVIII champions in the East Room of the White House May 21, 2014 in Washington, DC.
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Seattle Seahawks owner Paul Allen and head coach Pete Carroll of the Seattle Seahawks celebrate after the Seahawks defeated the Green Bay Packers in the 2015 NFC Championship game at Century Link Field on January 18, 2015 in Seattle, Washington.