Open Explained

Open may refer to:

In 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, an operator in mathematical morphology

In music:

In other fields:

open (application), Nextstep & Mac OS X command line application that opens it's argument(s) in the GUI as if the user had double clicked
Open circuit, 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 (magazine), a lifestyle Mexican publication.
Open (sport), type of competition in tennis and golf where entry is open to all qualifiers regardless of age
Open vowel, vowel sound of a type used in most spoken languages
Open...., the original interactive television service on BSkyBs Sky Digital platform
Organization of Pakistani Entrepreneurs of North America, inclusive, not-for-profit organization.
Open Season, a movie made in Sony Animation.
the C POSIX library function , defined in fcntl.h and used for C file input/output

See also