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Microsoft Office 2010, codenamed Office 14, is a productivity suite for Microsoft Windows, and the successor to Microsoft Office 2007 for Microsoft Windows. Office 2010 includes extended file compatibility, user interface updates, and a refined user experience. It will be available for Windows XP SP3 (32-bit), Windows Vista SP1, and Windows 7. With the introduction of Office 2010, a 64-bit version of Office is available for the first time, although only for Windows Vista SP1, Windows Server 2008 SP1, Windows 7 and Windows Server 2008 R2. Neither the 32-bit edition of Office 2010 nor the 64-bit edition is supported on Windows XP Professional x64 Edition.

On April 15, 2010, Microsoft announced that Office 2010 had been released to manufacturing, with those Volume Licensing customers who have Software Assurance being able to download the software from April 27. It will be available in June in retail stores in the US.

Office 2010 marks the debut of free online versions of Word, Excel, PowerPoint, and OneNote, which will work in popular web browsers (Internet Explorer, Mozilla Firefox, Google Chrome, and Apple Safari). A new edition of Office, Office Starter 2010, will replace the current low-end home productivity software, Microsoft Works.

Microsoft's update to its mobile productivity suite, Office Mobile 2010, will also be released for Windows Phones running Windows Mobile 6.5 and Windows Phone 7. In Office 2010, every application has the Ribbon, including OneNote 2010, Publisher 2010, InfoPath 2010, SharePoint Workspace 2010 (the new name for Microsoft Office Groove 2007) and the new Office Web Apps. (source : wikipedia.org)