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. Originally a marketing term for an office suite (included with productivity applications), the first version of Office included Microsoft Word, Microsoft Excel, and Microsoft PowerPoint. Over the years, Office applications have come significantly closer with shared features such as regular spell checking, OLE data integration, and the Visual Basic for Applications scripting language. Microsoft also positions Office as an enterprise software development platform under the Office Business Applications brand. On July 10, 2012, Softpedia reported that Office was used by more than a billion people worldwide.
Office is produced in several versions aimed at different end users and computer environments. The original and most used version is the desktop version, available for computers running Windows and macOS. Microsoft also maintains mobile apps for Android and iOS. Office on the Web is a version of software that runs in a browser.
Since Office 2013, Microsoft has marketed Office 365 as the primary way to obtain Microsoft Office: it allows the use of software and other services in a subscription business model, and users receive free software updates for the life of the subscription , including new features and cloud computing integration that are not necessarily included in «local» Office releases sold under conventional license terms. In 2017, Office 365 revenue increased sales of conventional licenses.