It is a very powerful tool that you can use to create presentations that include pictures, graphs, text and many other objects. Originally developed by Forethought, who Microsoft bought out, PPT is the worlds most popular presentation file format. Just like the PPTX format the PPSX format improves file sizing, data recovery and data management and allows for other applications to interact with it due to the XML structure. It supports Text, Images, Audio and Video and is stored in a zipped directory format which matches the OPC structure. PPSX are compressed and based on the ECMA-376 standard for Office Open XML. The 'X' extension refers to Microsoft Office 2007, 20 which ZIP compress the file and is therefore different from the previous versions which were generally have larger file sizes. It differs from PPTX which allows for the file to be editable. PPSX is a PowerPoint Open XML Slide Show - it is primarily designed to be non-editable and to simply playback the Powerpoint presentation.
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