OOo

OOo stood for OpenOffice.org, an open-source office suite.

''It was an open-sourced version of the earlier StarOffice, which Sun Microsystems acquired in 1999 for internal use. Sun open-sourced the software in July 2000 as a competitor to Microsoft Office, releasing version 1.0 on 1 May 2002. The project was closed by Oracle Corporation, the then-owner of Sun, in April 2011. Active successor projects include Apache OpenOffice (AOO), LibreOffice and NeoOffice.''

Versions
OpenOffice.org stopped at version 3.4. Apache OpenOffice started with version 4.0.