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. The first version of Office included Microsoft Word, Microsoft Excel, and Microsoft PowerPoint, originally a marketing term for an office suite (performance suite). Over the years, Office applications have grown significantly with shared features such as general spell checking, OLE data integration, and the Visual Basic scripting language for applications. Microsoft also positions Office as a platform for enterprise software development under the Office Business Applications brand. On July 10, 2012, Softpedia reported that Office was used by more than a billion people worldwide.
Office comes in different versions aimed at different end users and the computer environment. The original and most commonly used version is the desktop version, available for computers running Windows and macOS operating systems. Microsoft also supports mobile applications for Android and iOS. Office on the Web is a version of the software offered in a web browser.
Since Office 2013, Microsoft has promoted Office 365 as the most important way to acquire Microsoft Office: it allows the use of software and other subscription business model services, and users receive free software updates for the lifetime of the subscription, including new features and integration into cloud computing is not necessarily included in “local” versions of Office sold under conventional license terms. In 2017, Office 365 revenue exceeded conventional license sales.