PowerPoint
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 run on the Linux operating system, under the Wine compatibility layer.
PowerPoint is widely used by business people, educators, students, and trainers and is 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.
Supporters and critics generally agree[1][2][3] that the ease of use of presentation software can save a lot of time for people who otherwise would have used other types of visual aid—hand-drawn or mechanically typeset slides, blackboards or whiteboards, or overhead projections. Ease of use also encourages those who otherwise would not have used visual aids, or would not have given a presentation at all, to make presentations. As PowerPoint's style, animation, and multimedia abilities have become more sophisticated, and as the application has generally made it easier to produce presentations (even to the point of having an "AutoContent Wizard" suggesting a structure for a presentation), the difference in needs and desires of presenters and audiences has become more noticeable.
[edit] File formats
PowerPoint Presentation Filename extension .ppt
Internet media type application/vnd.ms-powerpoint
Uniform Type Identifier com.microsoft.powerpoint.ppt[4]
Developed by Microsoft
Type of format Presentation
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.[5]
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.