SAN FRANCISCO - Microsoft Corp unveiled a new version of its Office suite aimed at traditional PC users as well as the fast-growing tablet market in a major overhaul of the aging workplace software.
The revamped Office makes use of cloud computing and is compatible with touch screens widely used in tablets. It comes as Apple Inc and Google Inc make inroads into the workplace, long Microsoft's stronghold. Office is Microsoft's single-biggest profit driver.
"The Office that we'll talk about and show you today is the first round of Office that's designed from the get-go to be a service," Microsoft Chief Executive Steve Ballmer told reporters. "This is the most ambitious release of Microsoft Office that we've ever done."
Microsoft has a lot riding on the 15th version of Office. Windows is one of the world's biggest computing platforms, and the Office applications -- Word, Excel, PowerPoint, and other tools -- are used by more than 1 billion people around the world.
Microsoft last updated Office in 2010, when it incorporated online versions for the first time. The full version of Office 15 is expected to be available in early 2013.