  |  | | ANKARA (Reuters) - Turkey's courts have blocked access to Twitter days before elections as Prime Minister Tayyip Erdogan battles a corruption scandal that has seen social media platforms awash with alleged evidence of government wrongdoing. | |  | | (Reuters) - Symantec Corp's shares fell as much as 14 percent on Friday, a day after the security software maker fired its chief executive, raising concerns about its turnaround efforts. | |  | |  |  | | WASHINGTON/SAN FRANCISCO (Reuters) - Executives of several large U.S. Internet companies, including Google Inc and Facebook Inc, were to meet with President Barack Obama on Friday to discuss changes to government surveillance programs. | |  | |  |  | | WASHINGTON (Reuters) - A U.S. appeals court upheld the Federal Reserve's controversial rules for debit card "swipe fees" on Friday, disappointing merchants who had argued the charges were too high. | |  | |   |  | | SAN FRANCISCO (Reuters) - When Google started testing a free same-day shopping delivery service in San Francisco last year, industry observers were surprised by the company's foray into a notoriously tricky and decidedly low-margin real-world business. | |  | |   |  | | ISTANBUL (Reuters) - Turkish assets dropped on Friday after Turkey's courts blocked access to Twitter, unnerving investors and raising uncertainty just days before local elections. | |  | |   |  | | HELSINKI (Reuters) - Finland's Nokia, currently embroiled in an Indian Supreme Court tax case, said on Friday it has received a new 300 million euro (250 million pounds) sales tax bill from Tamil Nadu, a claim it considered "absurd". | |  | |   |  | | TOKYO (Reuters) - Mt. Gox said on Friday it found 200,000 "forgotten" bitcoins on March 7, a week after the Tokyo-based digital currency exchange filed for bankruptcy protection, saying it lost nearly all the 850,000 bitcoins it held, worth some $500 million at today's prices. | |  |   |  | | TORONTO (Reuters) - BlackBerry Ltd said on Friday it has reached an agreement to sell the vast majority of its real estate holdings in Canada, as part of a plan outlined earlier this year aimed at bolstering the technology company's balance sheet. | |  |   |  | | SHANGHAI (Reuters) - U.S. e-commerce giant Amazon.com Inc's China unit will strengthen regulation of its online sales channels and has closed down a third-party store, the online retailer said on Thursday, after state media criticized Amazon and smaller local rival Dangdang for selling fake cosmetics. | |  | |  |  |  | A daily digest of breaking business news, coverage of the US economy, major corporate news and the financial markets. 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