Using an unusual global tax structure, Apple Inc. has kept billions of dollars in profits in Irish subsidiaries to pay little or no taxes to any government, a U.S. Senate report on the company's offshore tax structure said on Monday.

A group of ex-Nokia employees who quit over the company's decision to abandon the planned MeeGo operating system in favor of Windows presented their own smartphone on Monday, hoping to rival the sector's giants.

United Airlines put its 787 Dreamliner back in the air on Monday, with both the airline and Boeing hoping to put the plane's four-month grounding behind them.

Actavis is buying Warner Chilcott in an all-stock deal valued at about US$8.5 billion that would create the third-biggest specialty pharmaceutical company in the U.S. market.

Former World Bank President Robert Zoellick said Monday that Japan's economic drive needed accompanying structural reforms, voicing fear that recent growth could be just a “sugar high.”

Shares in Japan's troubled electronics maker Sharp surged 13.22 percent Tuesday morning on a reported plan for a hefty asset sale, the day after rocketing 17 percent.

Yahoo has agreed to pay US$1.1 billion to buy blogging forum Tumblr, ranking it in among the top 10 tech deals announced this year, according to research firm Dealogic. Here's a list of the top 10 tech mergers and acquisitions in 2013. Valuation is based on Dealogic's criteria and includes debt.

British mobile phone giant Vodafone reported a 90-percent plunge in annual net profit on Tuesday after taking a vast impairment charge relating to businesses in debt-laden eurozone nations Italy and Spain.

Mexican phone giant America Movil, owned by billionaire Carlos Slim, announced Monday that its U.S. unit reached a deal to acquire U.S. mobile phone company Start Wireless Group.

Markets were fairly choppy Tuesday as investors were reluctant to push stock indexes up further ahead of a much-anticipated statement from U.S. Federal Reserve Chairman Ben Bernanke.