What is PPT?

Microsoft PowerPoint is a presentation program developed by Microsoft. It is part of the Microsoft Office suite, and runs on Microsoft Windows and the Mac OS X computer operating systems. The Windows version can also run on the Linux operating system, under the Wine compatibility layer.

PowerPoint is widely used by business people, educators, students, and trainers and among the most prevalent forms of persuasive technology. Beginning with Microsoft Office 2003, Microsoft revised the branding to emphasize PowerPoint's place within the office suite, calling it Microsoft Office PowerPoint instead of just Microsoft PowerPoint. The current versions are Microsoft Office PowerPoint 2007 for Windows and 2008 for Mac.

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Microsoft PowerPoint

PowerPoint presentations consist of a number of individual pages or "slides". The "slide" analogy is a reference to the slide projector, a device that has become obsolete due to the use of PowerPoint and other presentation software. Slides may contain text, graphics, movies, and other objects, which may be arranged freely on the slide. PowerPoint, however, facilitates the use of a consistent style in a presentation using a template or "Slide Master".

The presentation can be printed, displayed live on a computer, or navigated through at the command of the presenter. For larger audiences the computer display is often projected using a video projector. Slides can also form the basis of webcasts.

PowerPoint provides three types of movements:

1. Entrance, emphasis, and exit of elements on a slide itself are controlled by what PowerPoint calls Custom Animations
2. Transitions, on the other hand are movements between slides. These can be animated in a variety of ways
3. Custom animation can be used to create small story boards by animating pictures to enter, exit or move

With callouts, speech bubbles with edited text can be sent on and off to create speech. The overall design of a presentation can be controlled with a master slide; and the overall structure, extending to the text on each slide, can be edited using a primitive outliner.

Presentations can be saved and run in any of the file formats: the 2003 default .ppt (presentation), .pps (PowerPoint Show) or .pot (template). In PowerPoint 2007 and Mac OS X 2008 versions, the XML-based file formats .pptx, .ppsx and .potx have been introduced, along with the macro-enabled file formats .pptm, .potm, .ppsm.

PPT File format:

The binary format specification has been available from Microsoft on request, but since February 2008 the .ppt format specification can be freely downloaded and implemented under the Microsoft Open Specification Promise patent licensing.

In Microsoft Office 2007 the binary file formats were replaced as the default format by the new XML based Office Open XML formats, which are published as an open standard. Nevertheless, they are not complete as there are binary blobs inside of the XML files, and several pieces of behaviour are not specified but refer to the observed behaviour of specific versions of Microsoft products.

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