http://finance.yahoo.com/news/US-sues-Oracle-alleges-rb-2440594194.html?x=0&sec=topStories&pos=main&asset=&ccode= WASHINGTON (Reuters) - The Justice Department said on Thursday it sued Oracle Corp, alleging it defrauded the federal government on a software contract in effect from 1998 to 2006 that involved hundreds of millions of dollars in sales. The lawsuit alleged Oracle misrepresented its true commercial sales practices, ultimately leading to government customers receiving deals inferior to