Many had wondered whether the agency would seek to a forced break-up of the retail giant, which is also dominant in cloud computing and has a growing presence in other sectors like groceries and health care.

By Haleluya Hadero, Associated Press

Social networking Web sites such as MySpace and Facebook have started to allow advertisers to access users' profiles and target the ads they deliver to that user accordingly. A media and technology writer examines the potential impact this marketing may…