Oil prices tumbled to below $111 a barrel as weather forecasters said Hurricane Gustav was weakening as it advanced toward Louisiana.

Shionogi & Company, the Japanese drug maker, plans to buy an American rival, Sciele Pharma for $1.1 billion.

Investors dumped shares of Commerzbank on Monday, a day after the lender sealed an agreement to acquire Dresdner Bank, on concern that it had overpaid.

Changes in a loyalty program for Coke drinkers has upset some collectors of bottle-cap codes.

Agriprocessors, a kosher meat producer, is trying to persuade the Supreme Court to rule that illegal immigrants do not have the right to join labor unions.

Some people who use Twitter, the social messaging Web site, are taking things a step further, posing as characters in their favorite shows.

Ambit Energy has built up its sales by turning everyday people into sellers who promote the energy company to their friends and neighbors.

The new media players who came to the Democratic convention were not there just to annotate mainstream coverage: they’re in the hunt themselves.

After a Russian television station sidetracked a documentary about the razing of historic buildings, the filmmaker’s point found outlets in print and online.

Judy Estrin’s book is the latest call to action by scientists, technologists and political leaders worried about the country’s future competitiveness in technology.