Microsoft has added new file formats to Microsoft Office Word, Excel, and PowerPoint 2007 to reduce file size, improve security and reliability, and enhance integration with external sources. To help ensure that you can exchange documents between Microsoft Office releases, Microsoft has developed a Compatibility Pack for the Office Word, Office Excel, and Office PowerPoint 2007 File Formats.
The Open XML Formats usher in a new era of openness and transparency for Word, Excel and PowerPoint. Solution developers can take advantage of a host of new integration opportunities to connect documents to important sources of information. Learn more about the Open XML Formats.