An open source suite of business applications from The Apache Software Foundation that runs on Windows, Mac, Linux and various Unix versions. Founded by Sun which was its main supporter, Apache OpenOffice is an open source version of Sun's StarOffice. Supporting OpenDocument (ODF) as well as Microsoft Office file formats, OpenOffice includes a word processor (Writer), spreadsheet (Calc), presentation graphics (Impress), drawing program (Draw), database (Base) and equations (Math).In 2000, Sun gave the source code of StarOffice to the OpenOffice community, and the software was officially known as OpenOffice.org, the same name as the website. In 2011, Oracle, which had acquired Sun, turned OpenOffice over to the Apache Foundation. For more information, visit www.openoffice.org. See StarOffice, LibreOffice and OpenDocument.