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Irish Open (golf), Chicago Open, Open-source software development, Hybrid open-access journal, KSB Open, Open-wheel car, Kenya Open, Open-ended, Open sandwich, Open the Door, Open-work charm, Open education, Open gaming, Garden Open, Open Graphics Project, The Open Source Definition, Mizuno Open, Open–closed principle, Irish Poker Open, Open-source robotics, OpenDocument, Wuhan Open, Open-access monograph, Phoenix Open, Open-core model, Indonesia Open (golf), Open Firmware, Open Bogotá, Open letter, Open house (school), Open-Xchange, Open chord, Open Access Week, Open problem, Open access in France, Victorian Open, Open Knowledge Foundation, Open E, 2007 U.S. Open (golf), Open Season, Western Open, Thailand Open (golf), Open-source license, Open Cycle, Almost open map, Open-access mandate, Open business, Brussels Open, Nursing Open, British Open Squash Championships

Open, Open source, Open data, Open textbook, Open standard, Open-source film, Open collector, Open Season (film series), Open-design movement, Open-source car, The Open Championship, Doors Open Days, Open-pit mining, Open-source software, Open-source governance, Open House London, Open access, Open set, Open-source hardware, Open-source software movement, Canada Open, Open-source religion, Open world, Open plan, Open science, Open university (concept), The Open Definition, Open-access repository, Open marriage, Open.Michigan, Australian Open, X/Open, Open access in Belgium, Open and closed maps, Open House, Open-notebook science, Senior Open Championship, Open list, Open University, Taiwan Open (golf), Open-Sankoré, Irish Open (golf), Chicago Open, Open-source software development, Hybrid open-access journal, KSB Open, Open-wheel car, Kenya Open, Open-ended, Open sandwich, Open the Door, Open-work charm, Open education, Open gaming, Garden Open, Open Graphics Project, The Open Source Definition, Mizuno Open, Open–closed principle, Irish Poker Open, Open-source robotics, OpenDocument, Wuhan Open, Open-access monograph, Phoenix Open, Open-core model, Indonesia Open (golf), Open Firmware, Open Bogotá, Open letter, Open house (school), Open-Xchange, Open chord, Open Access Week, Open problem, Open access in France, Victorian Open, Open Knowledge Foundation, Open E, 2007 U.S. Open (golf), Open Season, Western Open, Thailand Open (golf), Open-source license, Open Cycle, Almost open map, Open-access mandate, Open business, Brussels Open, Nursing Open, British Open Squash Championships, North Dakota Open, Poznań Open, Open Door, U.S. Open Pool Championship, Open-mid vowel, Cincinnati Open, Business models for open-source software, Open classroom, Open architecture, Swedish Open, Open Up, Dallas Open, Thailand Open, Open-source ventilator, Claro Open Floridablanca, Open constituencies, Women's British Open, The Open Ecology Journal, Open de Portugal, BMJ Open, 2005 U.S. Open (golf), Polish Open (golf), Open educational practices, Heritage Open Days, Wide Open, Open space reserve, Maharashtra Open, List of open-source video games, Open government, Biology Open, Open book, OpenBSD, Open de Limoges, Gates Open Research, Yomiuri Open, Danish Open (golf), Korea Open (golf), Free and open-source software, Open 13, Open Doors, International Open Series, US Open Series, List of US Open singles finalists during the Open Era, Valero Texas Open, Open-air museum, Open market operation, Hylo Open, Open system, Alberta Open, OpenCL, 2007 US Open (tennis), 2005 European Judo Open Championships, 1979 U.S. Open (golf), Open-container law, 2023 Open Championship, Open Quaternary, U.S. Open (golf), 1968 US Open – Women's singles, Open air, 2004 U.S. Open (golf)