Apache OpenOffice, OpenServer, Prague Open, Swedish Open, Maharashtra Open, Stockholm Open, Nottingham Open, US Open Series, Mérida Open, Korea Open, Chile Open, Romanian Open, Rouen Open, German Open, Luxembourg Open, Prague Open (1987–1999), Jasmin Open, Ostrava Open, Slovak Open, Lyon Open, WTA Prague Open, Shenzhen Open, Guangzhou Open, Hong Kong Open, Valencia Open, Thailand Open (ATP), WTA Lyon Open, Geneva Open, Parma Ladies Open, Barcelona Open, Ecuador Open Quito, Swiss Open (tenis), WTA Japan Open Tennis Championships, Qatar Open, Malaysian Open (tenis), OpenDocument, China Open (tenis), Atlanta Open, Hamburg Open, Almaty Open, Croatia Open Umag

Serbia Open, Iași Open 2024, OpenTTD, San Diego Open, OpenOffice.org Impress, Andalucia Open 2021, Thailand Open (Pattaya), Sofia Open, Japan Open Tennis Championships, OpenDOAR, Abu Dhabi Open, Heaven's Open (píseň), Poland Open, Ladies Open Lugano, Madrid Open, E-Boks Open, Bangalore Open, ATP Auckland Open, OpenCms, Guadalajara Open, Rouen Open 2023, Open-source hardware, Rio Open, Stuttgart Open, Qatar Ladies Open, Swedish Open 2016, Țiriac Open 2024, Estoril Open (tenis), AGEL Open 2022, Swedish Open 2017, Mérida Open Akron 2023, Swedish Open 2013, Moselle Open, Monterrey Open, Open-source licence, Córdoba Open, Halle Open, I. ČLTK Prague Open 2021, Korea Open 2022, Charleston Open, OpenOffice.org Calc, Washington Open, Singapore Tennis Open, Rouen Open 2024, The Open Group, Brussels Open, Swedish Open 2015, Citi Open 2013, OpenStreetMap, Wuhan Open

Apache OpenOffice, OpenServer, Prague Open, Swedish Open, Maharashtra Open, Stockholm Open, Nottingham Open, US Open Series, Mérida Open, Korea Open, Chile Open, Romanian Open, Rouen Open, German Open, Luxembourg Open, Prague Open (1987–1999), Jasmin Open, Ostrava Open, Slovak Open, Lyon Open, WTA Prague Open, Shenzhen Open, Guangzhou Open, Hong Kong Open, Valencia Open, Thailand Open (ATP), WTA Lyon Open, Geneva Open, Parma Ladies Open, Barcelona Open, Ecuador Open Quito, Swiss Open (tenis), WTA Japan Open Tennis Championships, Qatar Open, Malaysian Open (tenis), OpenDocument, China Open (tenis), Atlanta Open, Hamburg Open, Almaty Open, Croatia Open Umag, Serbia Open, Iași Open 2024, OpenTTD, San Diego Open, OpenOffice.org Impress, Andalucia Open 2021, Thailand Open (Pattaya), Sofia Open, Japan Open Tennis Championships, OpenDOAR, Abu Dhabi Open, Heaven's Open (píseň), Poland Open, Ladies Open Lugano, Madrid Open, E-Boks Open, Bangalore Open, ATP Auckland Open, OpenCms, Guadalajara Open, Rouen Open 2023, Open-source hardware, Rio Open, Stuttgart Open, Qatar Ladies Open, Swedish Open 2016, Țiriac Open 2024, Estoril Open (tenis), AGEL Open 2022, Swedish Open 2017, Mérida Open Akron 2023, Swedish Open 2013, Moselle Open, Monterrey Open, Open-source licence, Córdoba Open, Halle Open, I. ČLTK Prague Open 2021, Korea Open 2022, Charleston Open, OpenOffice.org Calc, Washington Open, Singapore Tennis Open, Rouen Open 2024, The Open Group, Brussels Open, Swedish Open 2015, Citi Open 2013, OpenStreetMap, Wuhan Open, Malaysian Open, Kuala Lumpur, Düsseldorf Open, Open Gate – gymnázium a základní škola, Rouen Open 2022, Zhengzhou Open, I. ČLTK Prague Open 2020, Katowice Open, Welsh Open, Ordina Open 2009 – muži, Austrian Open Kitzbühel, Brasil Open, Slovenia Open, Portugal Open 2013, Topshelf Open 2013, Citi Open 2022, Open de Nice Côte d’Azur, Chile Open 2025, Open 13, Zürich Open, Țiriac Open 2025, Noventi Open 2019, Portugal Open, Rouen Open 2025, Tashkent Open 2017, Malaysian Open 2016, Thailand Open (Chua Chin), Montpellier Open, UNICEF Open 2010 – muži, Livesport Prague Open 2022, Stockholm Open 2024, Croatia Open Umag 2015, Jiangxi Open, I. ČLTK Prague Open 2022, Estoril Open 2016, Seznam juniorských vítězů na US Open, Estoril Open 2015, Winners Open 2021, Orange Warsaw Open, Ordina Open 2009 – ženy, Tashkent Open, Malaysian Open, Kia Korea Open 2014, Tianjin Open, Mérida Open Akron 2025, Nordea Open 2024, Open 13 2017, BOSS Open 2024, Gijón Open 2022, Shenzhen Open 2015, Citi Open 2012 – ženy, BMW Open 2016, Claro Open Colombia, Rio Open 2016, French Open 2008 – smíšená čtyřhra, U.S. Open (golf), Nordea Open 2023, Tashkent Open 2016, BOSS Open 2022, Hong Kong Tennis Open 2024, Hamburg Open 2024