World's biggest IT trade show CeBIT opened in Hanover

Visitors watch a presentation about cloud computing at the IBM booth at the CeBIT IT trade show in Hanover, Germany, March 4, 2009. The world's biggest IT trade show CeBIT was opened here Tuesday with special highlights on "Webciety" and "green IT." (Xinhua/Luo Huanhuan)

Visitors watch a presentation about cloud computing at the IBM booth at the CeBIT IT trade show in Hanover, Germany, March 4, 2009. The world's biggest IT trade show CeBIT was opened here Tuesday with special highlights on "Webciety" and "green IT." (Xinhua/Luo Huanhuan)