Microsoft has introduced the next version of Windows in San Francisco. It is called Windows 10.

"Windows is at a Threshold and now it's time for a new Windows," announced Terry Myerson, chief of Windows, at a press event. "Our new Windows must be built from the group up for a mobile first cloud first world. It unlocks new experiences to allow customers to work play and connect."

It's worth noting that all the rumours leading to today's announcement have indicated the next version of Windows would be called Windows 9 and that the software's codename was Threshold. It's not clear why Microsoft passed on Windows 9. Myerson simply said it "wouldn't be right".

As for Windows 10, Myerson said it will run on the broadest types of devices ever and that Microsoft wants to deliver one application platform. That means one app store, one way for people to find and buy apps, and one method for updating across all devices.

"Windows 10 will deliver the right experience at the right time," Myerson added. "Windows 10 will be our most comprehensive platform."

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READ: Microsoft Windows 10: Here's the top features to get excited about

For more information about Windows 10, including a closer look at the early build Microsoft is showing off, check out Pocket-lint's feature round up.