OpenOffice or open office may refer to:
Architecture
- Open plan office, a floor plan
Software
- Apache OpenOffice, a derivative of OOo by the Apache Software Foundation, with contribution from IBM Lotus Symphony
- OpenOffice.org (OOo), a discontinued open-source office software suite, originally based on StarOffice
- StarOffice, briefly renamed Oracle Open Office, a discontinued commercial proprietary office suite acquired by Sun Microsystems
See also
- LibreOffice, a derivative of OOo by The Document Foundation
- NeoOffice, a Mac-specific derivative of OOo by Planamesa Software