Microsoft Works is a discontinued productivity software suite developed by Microsoft and sold from 1987 to 2009. Its core functionality includes a word processor, a spreadsheet and a database management system. Later versions have a calendar application and a dictionary while older releases include a terminal emulator. Works is available as a standalone program and as part of a namesake home productivity suite. Because of its low cost, companies frequently preinstalled Works on their low-cost machines. Works is smaller, less expensive, and has fewer features than contemporary major office suites such as Microsoft Office.

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, 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.