Microsoft Office, or simply Office, is a family of client software, server software, and services developed by Microsoft. It was first announced by Bill Gates on August 1, 1988, at COMDEX in Las Vegas. Initially a marketing term for an office suite (bundled set of productivity applications), the first version of Office contained Microsoft Word, Microsoft Excel, and Microsoft PowerPoint. Over the years, Office applications have grown substantially closer with shared features such as a common spell checker, Object Linking and Embedding data integration and Visual Basic for Applications scripting language. Microsoft also positions Office as a development platform for line-of-business software under the Office Business Applications brand.

The suite includes a word processor (Word), a spreadsheet program (Excel), a presentation program (PowerPoint), a notetaking program (OneNote), an email client (Outlook) and a file-hosting service client (OneDrive). The Windows version includes a database management system (Access). Microsoft Publisher, a desktop publishing program that was previously included, will not be part of the suite from Office 2024 onwards in light of its forthcoming discontinuation.[19]