  |  | Wall St. sinks on news of Malaysian plane crash | NEW YORK (Reuters) - U.S. stocks ended sharply lower on Thursday, with the S&P 500 posting its biggest one-day percentage drop since April 10 on news that a Malaysian Airlines passenger jet crashed near the Ukraine-Russia border. | |  |  |  | Microsoft to cut 18,000 jobs this year as it chops Nokia | SEATTLE (Reuters) - Microsoft Chief Executive Officer Satya Nadella kicked off one of the largest layoffs in tech history on Thursday, hoping to reshape the aging PC industry titan into a nimbler rival to Apple and Google, and jolt a culture at the company that is used to protecting its existing Windows and Office franchises. | |  | |   |  | IBM beats revenue estimates as company focuses on big data, cloud | WASHINGTON (Reuters) - International Business Machines Corp reported higher than expected quarterly revenue, as it continued to divest low performing sectors and shift to higher-end businesses such as big data, cloud computing, and security and mobile services. | |  | |   |  | HP appoints CEO Whitman chairman, expands board | SAN FRANCISCO (Reuters) - Hewlett-Packard Co appointed Chief Executive Officer Meg Whitman its chairman on Thursday and enlisted Alcoa CEO Klaus Kleinfeld as an independent director, adding a 12th member to its board. | |  | |   |  | U.S. economy gaining traction despite weak housing | WASHINGTON (Reuters) - The number of Americans filing new claims for unemployment benefits unexpectedly fell last week, pointing to sustained momentum in the economy even as home building fell for a second straight month in June. | |  | |   |  | Senators to GM: Why wasn't top lawyer fired? 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