Microsoft PowerPoint is a presentation program developed by Microsoft. It is part of the Microsoft Office system. Microsoft PowerPoint runs on Microsoft Windows and the Mac OS computer operating systems.

It is widely used by business people, educators, students, and trainers and is among the most prevalent forms of persuasion technology. Beginning with Microsoft Office 2003, Microsoft revised branding to emphasize PowerPoint's identity as a component within the office suite. Microsoft began calling it Microsoft Office PowerPoint instead of merely Microsoft PowerPoint. The current version is Microsoft Office PowerPoint 2007. As a part of the Microsoft Office suite, PowerPoint has become the world's most widely used presentation program.

Microsoft Office 2007 filename extensions

Word 2007 File Type Extension

docx - Word 2007 XML Document
docm - Word 2007 XML Macro-Enabled Document
dotx - Word 2007 XML Template
dotm - Word 2007 XML Macro-Enabled Template
Excel 2007 File Type Extension

xlsx - Excel 2007 XML Workbook
xlsm - Excel 2007 XML Macro-Enabled Workbook
xltx - Excel 2007 XML Template
xltm - Excel 2007 XML Macro-Enabled Template
xlsb - Excel 2007 binary workbook (BIFF12)
xlam - Excel 2007 XML Macro-Enabled Add-In
PowerPoint 2007 File Type Extension

pptx - PowerPoint 2007 XML Presentation
pptm - PowerPoint 2007 Macro-Enabled XML Presentation
potx - PowerPoint 2007 XML Template
potm - PowerPoint 2007 Macro-Enabled XML Template
ppam - PowerPoint 2007 Macro-Enabled XML Add-In
ppsx - PowerPoint 2007 XML Show
ppsm - PowerPoint 2007 Macro-Enabled XML Show
Access 2007 introduces a few new file extensions:

ACCDB The file extension for the new Office Access 2007 file format. This takes the place of the MDB file extension.
ACCDE The file extension for Office Access 2007 files that are in "execute only" mode. ACCDE files have all Visual Basic for Applications (VBA) source code removed. A user of an ACCDE file can only execute VBA code, not modify it. ACCDE takes the place of the MDE file extension.
ACCDT The file extension for Access Database Templates.
ACCDR is a new file extension that enables you to open a database in runtime mode. By simply changing a database's file extension from .accdb to .accdr, you can create a "locked-down" version of your Office Access 2007 database. You can change the file extension back to .accdb to restore full functionality.

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Microsoft Office is an office suite from Microsoft for the Microsoft Windows and Mac OS X operating systems. Along with core office applications, it includes associated servers and web-based services. Recent versions of Office are referred as "Office system".

The current versions are Office 2007 for Windows, launched on January 30, 2007,[1] and Office 2008 for Mac OS X, released January 15, 2008. Office 2007/Office 2008 features a distinct user interface and a new XML-based primary file format. There is no current version for Mac OS Classic.

Office was introduced by Microsoft in 1989 on Mac OS,[2] with a version for Windows in 1990.[3] Initially a marketing term for a bundled set of applications, the first version of Office contained Microsoft Word, Microsoft Excel, and Microsoft PowerPoint. Additionally, a "Pro" version of Office included Microsoft Access and Schedule Plus. Over the years, Office applications have grown substantially closer with shared features such as a common spell checker, OLE data integration and Microsoft Visual Basic for Applications scripting language. Microsoft also positions Office as a development platform for line-of-business software under the Office Business Applications (OBA) brand.

A major feature of the Office suite is the ability for users and third party companies to write add-ins that extend the capabilities of an application by adding custom commands and specialized features. The type of add-ins supported differ by Office versions:

Office 97 onwards (standard Windows DLLs i.e. Word WLLs and Excel XLLs)
Office 2000 onwards (COM add-ins)
Office XP onwards (COM/OLE Automation add-ins)
Office 2003 onwards (Managed code add-ins)

PowerPoint
Main article: Microsoft PowerPoint
Microsoft PowerPoint is a popular presentation program for Windows and Mac. It is used to create slideshows, composed of text, graphics, movies and other objects, which can be displayed on-screen and navigated through by the presenter or printed out on transparencies or slides. Office Mobile for Windows Mobile 5.0 and later features a version of PowerPoint called PowerPoint Mobile. It also possesses a dominant market share. Movies, videos, sounds and music, as well as wordart and autoshapes can be added to slideshows. It is available for the Windows and Mac platforms.

Common extensions:

.ppt (PowerPoint 97-2004)
.pptx (PowerPoint 2007/2008)
.pot
.pps (PowerPoint 97-2004)
.ppsx (PowerPoint 2007/2008)