The release includes numerous changes, including a new XML-based file format, a redesigned interface, an integrated equation editor and bibliographic management. Additionally, an XML data bag was introduced, accessible via the object model and file format, called Custom XML - this can be used in conjunction with a new feature called Content Controls implement structured documents. It also has contextual tabs, which are functionality specific only to the object with focus, and many other features like Live Preview (which enables you to view the document without making any permanent changes), Mini Toolbar, Super-tooltips, Quick Access toolbar, SmartArt, etc.
Word 2007 uses a new file format called docx. Word 2000-2003 users on Windows systems can install a free add-on called the "Microsoft Office Compatibility Pack" to be able to open, edit, and save the new Word 2007 files. Alternatively, Word 2007 can save to the old doc format of Word 97-2003.
Word 2008 is the most recent version of Microsoft Word for the Mac, released on January 15, 2008. It includes some new features from Word 2007, such as a ribbon-like feature that can be used to select page layouts and insert custom diagrams and images. Word 2008 also features native support for the new Office Open XML format, although the old .doc format can be set as a default.
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- http://www.microsoft.com/downloads/details.aspx?familyid=941B3470-3AE9-4AEE-8F43-C6BB74CD1466&displaylang=en Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats
- http://archive.is/20120715033535/techrepublic.com.com/5208-6230-0.html?forumID=102&threadID=218738&messageID=2212198 How to save as doc in Word 2007
- http://www.walterglenn.com/2007/01/13/save-as-doc-instead-of-docx-in-word-2007/ How to configure Word 2007 to always save as doc
- The default format can be changed under preferences --> save--> dropdown menu 
|Word 2008 Branch|
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