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A file to store the generated presentations and Microsoft PowerPoint slide shows with the ability to edit them. It was first introduced to store the data in PowerPoint 97 Editor. Stores a set of individual slides with text, graphics, video, and audio information. The file contains information on visual effects inside the slides.

Is an e-book format developed for the Psion Series 3 platform used in the 1990s. It contains text and its formatting parameters. This e-book format was used exclusively in Psion devices.