MICROSOFT OFFICE

Microsoft Office is an office suite of inter-related desktop applications, servers and services for the Microsoft Windows and Mac OS X  operating systems, introduced by Microsoft in 1989. 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" (Professional) 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.
The current versions are Office 2010 for Windows which was released on June 15, 2010, and Office 2011 for Mac OS X, released October 26, 2010. Office 2007 and 2008 introduced a new user interface and new Office Open XML document formats (docx, xlsx, pptx). Consequently, Microsoft has made available, free of charge, an add-on known as the Microsoft Office Compatibility Pack to allow Office 2000-2003 for Windows and Office 2004 for Mac editions to open, edit, and save documents created under the new formats for Office 2007.

Applications
Microsoft Word:
Microsoft Word is a word processor and was previously considered to be the main program in Office. Its proprietary DOC format is considered a de facto standard, although Word 2007 can also use a new XML-based, Microsoft Office-optimized format called .DOCX which has been standardized by Ecma International as Office Open XML and its SP2 update will support ODF and PDF. Word is also available in some editions of Microsoft Works. It is available for the Windows and Mac platforms. The first version of Word, released in the autumn of 1983, was for the MS-DOS operating system and had the distinction of introducing the mouse to a broad population. Word 1.0 could be purchased with a bundled mouse, though none was required. Following the precedents of LisaWrite and MacWrite, Word for Macintosh attempted to add closer WYSIWYG features into its package. Word for Mac was released in 1985. Word for Mac was the first graphical version of Microsoft Word. Despite its bugginess, It became one of the most popular Mac applications.
Microsoft Excel:
Microsoft Excel is a spreadsheet program which originally competed with the dominant Lotus 1-2-3, but eventually outsold it. It is available for the Windows and Mac platforms. Microsoft released the first version of Excel for the Mac in 1985, and the first Windows version (numbered 2.05 to line up with the Mac and bundled with a standalone Windows run-time environment) in November 1987.
Microsoft Outlook and Microsoft Entourage:
Microsoft Outlook (not to be confused with Outlook Express) is a personal information manager and e-mail communication software. The replacement for Windows Messaging, Microsoft Mail and Schedule+ starting in Office 97, it includes an e-mail client, calendar, task manager and address book. Office Although historically it has been offered for the Mac, the closest to an equivalent for Mac OS X is Microsoft Entourage, which offers a slightly different feature set. Office 2011 for Mac will reintroduce Outlook, replacing Entourage.
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. This is convenient for school or work presentations. Office Mobile for Windows Mobile 5.0 and later features a version of PowerPoint called PowerPoint Mobile. Movies, videos, sounds and music, as well as Wordart and Autoshapes can be added to slideshows.
Microsoft Publisher:
Microsoft Publisher is a program mostly used for designing brochures, labels, calendars, greeting cards, business cards, newsletters, and postcards.