Open

Open may refer to:

Philosophy

• Openness, term being used to define the basis of how various groups and organizations operate

Mathematics

• Open problem, a well-defined problem with no known solution in science and mathematics
• Open set, set in topology and related fields of mathematics
• Opening (morphology), an operator in mathematical morphology
• Open map, a function that is open

Music and media

• Open (Shaznay Lewis album), 2004 album by Shaznay Lewis
• Open (Blues Image album), Blues Image's second album
• Open (Cowboy Junkies album), an album by the Canadian band Cowboy Junkies, released in 2001
• Open (Gotthard album), the fourth studio album by the hard rock band Gotthard
• Open (YFriday album), the second studio album from the Christian band YFriday, released in 2001
• Open, 1967 album by Julie Driscoll, Brian Auger and the Trinity
• Open (band), Australian pop/rock band
• "Open", a song by The Cure on their album Wish
• Open Season (film), a 2006 movie made in Sony Animation
• Open...., the original interactive television service on BSkyBs Sky Digital platform
• Open (Jon Anderson album), a 2011 album released through Digital Download

Language and literature

• Open vowel, vowel sound of a type used in most spoken languages
• Open (magazine), a lifestyle Mexican publication
• OPEN (Indian magazine), an Indian weekly English language magazine featuring current affairs
• Open: An Autobiography, by Andre Agassi (2010)

Electronics and computer science

• open (process), Nextstep & Mac OS X command line application that opens its argument(s) in the GUI as if the user had double clicked
• Open-circuit voltage, in electronics, the absence of a load through which electric current would flow
• Open-source software, computer software modifiable by all, where users are treated as co-developers
• Open system (computing), computer systems that provide interoperability
• Open (system call), standardized system call for opening files

Other fields

• Open (sport), type of competition in tennis, golf and other sports where entry is open to all qualifiers regardless of age or ability
• Organization of Pakistani Entrepreneurs of North America, inclusive, not-for-profit organization
• Open surgery as opposed to minimally invasive surgery
• Online Protection and Enforcement of Digital Trade Act, or OPEN Act, a bill in the United States Congress to prohibit internet censorship.

See also

• Open-ended (disambiguation)
• Open mind (disambiguation)
• Open system (disambiguation)
• Open education
• Opening (disambiguation)
• Close (disambiguation)