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OpenOffice or open office may refer to:



  • (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

Other derivatives of OOo:

  • LibreOffice, an actively developed derivative of OOo by The Document Foundation
  • NeoOffice, a macOS-specific commercial derivative of OOo by Planamesa Software
  • StarOffice, a discontinued commercial proprietary office suite acquired by Sun Microsystems (briefly renamed Oracle Open Office after Oracle acquired Sun)


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

File formats[edit]

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


  • 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)