Open source
Halle Open
German Open (WTA)
Madrid Open
Hamburg Open
US Open-mesterskabet i damedouble
Pan Pacific Open
Almaty Open
Open access
Noventi Open 2020
Dallas Open
Barcelona Open
Gijón Open
Wien Open
Miami Open
OpenOffice.org
Wuhan Open
Qatar Ladies Open
US Open-mesterskabet i herresingle
Charleston Open
US Open (tennis)
French Open-mesterskabet i damesingle 2009
Australian Open-mesterskabet i mixed double 2013
Washington Open
Connecticut Open
French Open-mesterskabet i herredouble 2009
Open Source Days
French Open-mesterskabet i damedouble 2009
French Open-mesterskabet i damesingle 2013
Japan Open Tennis Championships
Open de Suède Vårgårda 2016
Open Doors
Australian Open-mesterskabet i herredouble 2009
Barcelona Open 2009
Almaty Open 2024
Australian Open-mesterskabet i herresingle
US Open-mesterskabet i herresingle 2011
Cincinnati Open 2021
Australian Open-mesterskabet i damedouble 2013
Cincinnati Open
US Open-mesterskabet i damesingle 2011
China Open
French Open-mesterskabet i damedouble 2013
French Open-mesterskabet i herresingle 2009
China Open 2012 (tennis)
The Open Championship
French Open-mesterskabet i herredouble 2013
Australian Open-mesterskabet i mixed double 2009
Australian Open-mesterskabet i herredouble 2013
Australian Open-mesterskabet i herresingle 2013
Open source-religion
French Open-mesterskabet i mixed double 2009
Cincinnati Open 2024
French Open-mesterskabet i herresingle 2013
Noventi Open 2019
Halle Open 2023
Cincinnati Open 2023
Zurich Open
Open Vlaamse Liberalen en Democraten
Australian Open-mesterskabet i herresingle 2009
Australian Open-mesterskabet i damesingle 2013
Australian Open-mesterskabet i damesingle 2009
Charleston Open 2021
Córdoba Open
Canadian Open 2021
Stockholm Open 2023
Open mike
French Open-mesterskabet i mixed double 2013
Pan Pacific Open 2012
US Open-mesterskabet i herresingle 2012
Stockholm Open 2024
Open de Suède Vårgårda 2017
Halle Open 2022
Open de Suède Vårgårda 2018
US Open Series
Cincinnati Open 2020
Denmark Open
Halle Open 2024
Australian Open-mesterskabet i damedouble 2009
OpenOffice.org Writer
Danish Open
Open de Suède Vårgårda 2015 - linjeløb
Canadian Open 2024
Canadian Open 2023
Cincinnati Open 2022
Guadalajara Open
Canadian Open 2022
French Open 1979
US Open 1982
Australian Open-mesterskabet i damesingle
Gudenaa Open Water
French Open
Madrid Open 2020
US Open
Open Places
Austrian Open Kitzbühel
Hamburg Open 2024
Copenhagen Open
Rio Open
US Open 2014
German Open
French Open 1975
French Open 1977
Lyoness Open
French Open 1972
Noventi Open 2021
US Open 2015
Australian Open 2025
OpenNebula
US Open 2016
Australian Open 2026
French Open 1976
Australian Open 2009
Korea Open 2022
French Open 1973
French Open 1971
Australian Open 2013
Barcelona Open 2020
French Open 1978
Office Open XML
Mutua Madrileña Madrid Open 2009
French Open 1974
Australian Open 2012
Australian Open 2015
US Open 2013
US Open 2025
Miami Open 2020
Open Source Initiative
US Open 1981
US Open-mesterskabet i damesingle 2012
US Open 2020
US Open 2017
French Open 2011
French Open 2025
US Open 2011
Stockholm Open
US Open 2022
US Open-mesterskabet i herredouble 2012
US Open 2019
Guadalajara Open 2025
US Open 1974
Australian Open 2014
OpenStreetMap
Abu Dhabi Open
Australian Open-mesterskabet i damedouble 2015
French Open 2010
French Open 1970
US Open 1980
US Open 2024
US Open 2023
French Open 2012
Australian Open 2016
BNP Paribas Open 2010
Pan Pacific Open 2009
US Open 2009
Maharashtra Open
Madrid Open 2018
Australian Open 2023
Indian Wells Open 2023
French Open 2009
Moselle Open
Madrid Open 2017
Zhengzhou Open
US Open 2018
US Open 1973
Australian Open 1971
Australian Open 2011
Australian Open 1970
Australian Open 2024
French Open 2013
US Open 1979
Open Group
Åbent indhold
US Open 1972
US Open-mesterskabet i herredouble
US Open 2010
US Open (badminton)
Australian Open 2017
US Open 1978
BNP Paribas Open
Australian Open 2010
Australian Open 2019
US Open-mesterskabet i damedouble 2025
Open Court
US Open-mesterskabet i herredouble 2025
Australian Open-mesterskabet i herredouble 2025
Denmark Open 2006
Free/Libre and Open Source Software
Australian Open
Australian Open 2018
French Open 2014
US Open 1970
Australian Open 2020
Monte Carlo Open 1981
US Open 1975
US Open 2008
Australian Open 2022
Australian Open 1969
US Open 1976
Australian Open-mesterskabet i herredouble 2015