Microsoft Office is an office suite of applications, servers, and services developed by Microsoft. It was first announced by Bill Gates on 1 August 1988, at COMDEX in Las Vegas. Initially a marketing term for a bundled set of 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, OLE 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. On 10 July 2012, Softpedia reported that Office is used by over a billion people worldwide. Office is produced in several versions targeted towards different end-users and computing environments. The original, and most widely used version, is the desktop version, available for PCs running the Windows and macOS operating systems. The most current desktop version is Office 2016 for Windows and macOS/OS X, released on 22 September 2015 and 9 July 2015, respectively. More recently, Microsoft developed Office Mobile, which are free-to-use versions of Office applications for mobile devices. They are currently available and supported on iOS, Android, Windows 10 and Windows 10 Mobile. Office Mobile is or was also available, though no longer supported, on Windows Mobile, Windows Phone and Symbian. There is also Office RT, a touch-optimized version of the standard desktop Office suite, pre-installed on Windows RT. Finally, with the rise of cloud computing, Microsoft also produces and runs Office Online, a web-based version of core Office apps, which is included as part of a Microsoft account.