 Microsoft PowerPoint 2007 and 2010 also generate .eot files with the '.fntdata' extension when fonts are selected to be embedded in a presentation by the PowerPoint client application.These .eot files can be extracted from the '.pptx' file and used directly on web pages.Critical security update for Windows Vista KB969947 resolves several security issues that "could allow remote code execution if a user viewed content rendered in a specially crafted Embedded OpenType (EOT) font".