(This restriction means that ACM TOMS software is not Free and open-source software according to The Free Software Definition or The Open Source Definition.)
Australian Open | French Open | Open University | open source | High-definition television | U.S. Open | Wacken Open Air | high-definition television | The Open Championship | U.S. Open (tennis) | source code | High-definition video | All England Open Badminton Championships | U.S. Open (golf) | Open Source | Open-pit mining | 2006 Australian Open | Open Software Foundation | Indira Gandhi National Open University | Lamar Hunt U.S. Open Cup | high-definition video | 2005 Australian Open – Men's Singles | U.S. Women's Open | open access | Gerry Weber Open | Swedish Open | source | International GT Open | Federal Open Market Committee | 2014 Australian Open – Men's Singles |