OpenOffice or open office may refer to:

Computing

Software

• OpenOffice.org (OOo), a discontinued open-source office software suite, originally based on StarOffice
• Apache OpenOffice (AOO), a derivative of OOo by the Apache Software Foundation, with contribution from IBM Lotus Symphony

Programming

• OpenOffice Basic (formerly known as StarOffice Basic or StarBasic or OOoBasic), a dialect of the programming language BASIC

File formats

• OpenDocument format (ODF), also known as Open Document Format for Office Applications, a widely supported standard XML-based file format originating from OOo
• OpenOffice.org XML, a file format used by early versions of OpenOffice.org
• Office Open XML (OOXML), a competing file format from Microsoft

Other uses

• Open plan, a floor plan
• Open Document Architecture (ODA), document interchange format (CCITT T.411-T.424, equivalent to ISO 8613)
• OpenDoc, an abandoned multi-platform standard for compound documents, intended as an alternative to Microsoft's Object Linking and Embedding (OLE)

This disambiguation page lists articles associated with the title OpenOffice.
If an internal link led you here, you may wish to change the link to point directly to the intended article.