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The PPTX Format
With Microsoft Office 2007, Microsoft introduced a new XML based file format called the Office Open XML (OOXML) document format. This new format is based on XML and has been adopted as an official standard for representing office documents like word processing files, spreadsheets, and presentations. These new files append an x to the end of the old Office file extensions, so PowerPoint files now have the .pptx extension. We read and write this format natively, which is why we give you the opportunity to download, email, and share presentations as PPTX files.
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ODP Format
The ODP file type is primarily associated with 'OpenOffice/StarOffice' by Sun Microsystems, Inc.. This file format is part of the Open Document Format for Office Applications (OpenDocument) 1.0 specification. This OASIS format is expected to become an industry standard for sharing documents. It is being adopted by the OpenOffice/StarOffice version 2 software suite but may appear in other products as well.
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