By default, you can't open a PDF file in Excel 2010, the spreadsheet software from Microsoft. To be able to import your data into Excel, you must export the PDF as an XML file using Adobe Acrobat ...

Simply put, .xlsx is a file extension for the open XML spreadsheet used by Microsoft Excel from 2007 onwards. Why the change in format from earlier versions of Excel?

The next version of Office will fully support two new file formats, Strict Open XML and Open Document Format 1.2, Microsoft has announced. In a blog post on Monday, Office standards chief Jim ...

The converter provides read-only access to Office Open XML documents created with Office 2007. For the time being, it's Word-only and can convert those files to Rich Text Files (.rtf).

Microsoft’s Open XML File Format Converter for Mac 1.0 has been released. The converter allows users to convert files created in Office 2008 for Mac or its Windows counterpart.