Microsoft Excel is a proprietary spreadsheet application developed by Microsoft. Its first version was released for Macintosh in 1985 and later for Windows in 1987. It later overtook Lotus 1-2-3 as the leading spreadsheet application in the market by the 1990s. MS Excel can be installed on a PC as a single application or as part of the Microsoft Office suite. Since it overtook Lotus 1-2-3, different versions of Microsoft Excel have been developed with different features. This has made Excel one of the most used spreadsheet applications in the world.