By Alexei Oreskovic. SAN FRANCISCO | Tue May 21, 2013 12:19am EDT. SAN FRANCISCO (Reuters) - Yahoo Inc Chief Executive Marissa Mayer's $1.1 billion acquisition of blogging service Tumblr will be a test of her ability to revive the aging Web portal.

Apple uses a "highly questionable" web of offshore entities to avoid paying billions in US income taxes, a Senate committee alleged on Monday.

NEW DELHI�Outsourcing firm iGate Corp. said its board fired President and Chief Executive Phaneesh Murthy with immediate effect for allegedly failing to report a relationship with a subordinate employee.

As 787 Dreamliner commercial flights resume after a lengthy grounding for battery problems, Boeing Co. and its customers are refocusing on fixing the host of other technical and mechanical issues that affect the reliability of the cutting-edge aircraft.

Fannie Mae and Freddie Mac (FMCC) are exempt from Michigan's state and local real estate transfer taxes, a U.S. appeals court ruled, overturning a lower-court decision.

Nick Buckles is to retire from G4S after a difficult year that saw the chief executive survive calls for his departure after the mishandling of a high profile contract to provide security guards to the London 2012 Olympics.

GrubHub Inc. and Seamless North America LLC, two of the top food-delivery websites in the U.S., have agreed to combine their companies to take on rivals in the growing market for online meal orders.

By Ayai Tomisawa. TOKYO | Tue May 21, 2013 1:06pm IST. TOKYO (Reuters) - Japan's Nikkei share average edged up to a fresh 5-1/2-year high on Tuesday, reversing earlier losses, as retail investors scooped up underperforming stocks such as Sharp Corp ...

Federal Reserve Bank of Chicago President Charles Evans said the U.S. economy has improved �quite a lot� as the central bank maintains record stimulus and expressed confidence policy makers have tools needed to monitor markets for excesses.

Elon Musk, Tesla Motors Inc. (TSLA)'s chief executive officer and co-founder, said in a Twitter post the electric-car maker will �probably� repay its Energy Department loan as early as tomorrow.