The list of software includes Android tablet versions of Word, Excel and Powerpoint. Although these are free for download, which will allow users to log in with their Microsoft account, create, edit and print files, some advanced features will be limited to Office 365 subscribers. Microsoft needed the preview program in order to get its Office apps to support a vast choice of devices.

Microsoft Office apps have been available for both iPad and iPhone as of last year and, according to Microsoft, have seen more than 80 million downloads.

While it did officially launch Office for Android tablets, or precisely, pulled it from its preview state, it still does not have support for Intel SoCs, which should be coming "within a quarter" or essentially later this year.

Microsoft is already working on the new Office 2016 for desktop which will also include a universal app for smartphones and small tablets that will come with Windows 10, so this new Android version of Office might not last long.

In addition to the new Office for Android tablet, Microsoft also unveiled the new Outlook app for both iOS and Android devices.