Yahoo!

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Marissa Mayer, one of the first executives hired at Google, is moving to lead Yahoo. She is the fifth top executive to lead the firm in the past five years. (Associated Press)

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** FILE ** This combination of 2012 file photos shows the logos of Yahoo, left, and Facebook, outside their offices in Santa Clara, Calif. and Menlo Park, Calif. The two companies have agreed to settle a patent dispute on Friday, July 6, 2012, averting a potentially bitter battle over the technology running two of the Internet's most popular destinations. (AP Photo/Paul Sakuma)

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Scott Thompson on Sunday became the fourth chief executive officer to leave Yahoo in five years. When Mr. Thompson came on board in January, he made big changes, but they haven't yet had the desired turnaround effect. (Associated Press)

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Yahoo has teamed with Tom Hanks for an animated sci-fi series, part of an industry movement toward more original content online. (Associated Press)

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Yahoo Chairman Roy Bostock (below) and three longtime board members are stepping down from their positions at the Internet company, which has lagged in the race against rivals such as Google and Facebook. (Associated Press)

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**FILE** PayPal president Scott Thompson, seen here Nov. 15, 2010, at the Web 2.0 Summit in San Francisco, was picked by Yahoo as its next CEO on Jan. 4, 2012. (Associated Press)

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** FILE ** Yahoo offices. (AP Photo)

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Actress Judy Greer and chef Jared Sokoloff appear in the Yahoo Web series "Reluctantly Healthy." Yahoo announced Tuesday that it will begin premiering seven new Web series this week, all targeting female audiences. (Yahoo via Associated Press)

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ABC News President Ben Sherwood (left) and Ross Levinsohn, Yahoo! executive vice president of the Americas, talk Monday about their companies' new partnership. ABC News content will be featured prominently on Yahoo! (Associated Press)

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**FILE** Yahoo CEO Carol Bartz speaks Nov. 16, 2010, at the Web 2.0 Summit in San Francisco.

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FILE - This file photo made June 7, 2010, shows a sign for Yahoo! in New York. Investors are running up the price of Yahoo shares Thursday, Oct. 14, 2010, after a report saying AOL and a group of private equity firms may bid for the Web company. (AP Photo/Mark Lennihan, file)