SAN FRANCISCO (Reuters) - Four out of five Facebook Inc users have never bought a product or service as a result of advertising or comments on the social network site, a Reuters/Ipsos poll shows, the latest sign that much more needs to be done to turn its 900 million customer base into advertising dollars.

KUALA LUMPUR (Reuters) - Exxon Mobil Corp , the world's largest publicly traded energy company, is considering exporting liquefied natural gas (LNG) from the United States, CEO Rex Tillerson said on Tuesday.

SAN JOSE, California (Reuters) - Oracle Corp violated a clear contract with Hewlett-Packard Co when it decided it would no longer make new versions of its database software compatible with HP's Itanium-based servers, a lawyer for HP said in court.

NEW YORK (Reuters) - The law firm Brown Rudnick has been tapped to represent the committee of unsecured creditors in the bankruptcy of legal giant Dewey & LeBoeuf - a bankruptcy that is expected to be contentious and could drag on for years.

TOKYO (Reuters) - Asian shares, the euro and commodities rebounded on Tuesday, with stocks holding a touch above 2012 lows, as investors looked to European policymakers and the wider G7 to take decisive action to address the worsening euro zone crisis.

NEW YORK (Reuters) - Expectations for U.S. corporate earnings are deflating fast as the euro zone crisis deepens and economic data around the world disappoints.

TAIPEI (Reuters) - Ford Motor is in talks with its partners to introduce indigenous brands in China, while it focuses on building up its own brand in the world's biggest auto market, its China chief said on Monday.

TAIPEI (Reuters) - Taiwan's Acer Inc said on Monday it would remain closer to U.S. chipmaker Intel, even though Microsoft also embraces rival ARM for its new Windows 8 operating system.

PARIS (Reuters) - Ex-trader Jerome Kerviel arrived in court on Monday to appeal against a three-year prison sentence for his role in France's biggest-ever rogue trading scandal, which cost French bank Societe Generale 4.9 billion euros ($6.1 billion).

BEIJING (Reuters) - Investors counting on China to repeat its huge 2008-09 stimulus to backstop global economic growth are failing to recognize Beijing's limited scope to deliver another major spending surge.

(Reuters) - Stock index futures pointed to a lower open on Wall Street on Monday, with futures for the S&P 500 down 0.3 percent, while Dow Jones and Nasdaq 100 futures were 0.5 percent lower at 05:12 a.m. EDT (0912 GMT).

(Reuters) - Lawyers for Hewlett-Packard Co and Oracle Corp will face off in court on Monday for opening statements in a bitter lawsuit over Oracle's decision to end support for HP's Itanium-based servers.