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OpenOffice or Open Office stand for:

Office packages:

  • Apache OpenOffice (formerly ), open source office suite from the Apache Software Foundation
  • LibreOffice , the code base, an open source office suite from the Document Foundation
  • NeoOffice , an open source office package for macOS from Planamesa Software built on the code base of
  • StarOffice , between May 2002 and November 2008 based on both proprietary source code and the source code of
  • Oracle Open Office, continuation of StarOffice or commercial version of, only one version in December 2010

File formats:

  • XML, a file format used by earlier versions of, based on the OpenDocument format
  • Office Open XML , a file format from Microsoft