Microsoft Office is a suite of desktop applications, servers and services introduced in 1989. It originally included Word, Excel and PowerPoint. Over time, Office applications have integrated shared features.
The current versions are Office 2013 for Windows and Office 2011 for Mac. Office 2013 was released in October 2012 and includes updated versions of Word, Excel, PowerPoint and other applications.
Word is a word processor that was previously the main Office application. It saves documents in the .docx format and is available for Windows and Mac. The first version of Word was released in 1983 for MS-DOS and introduced the mouse.