Open class

Open class may refer to:

Open class (linguistics), a word class readily accepting new items
Open class (horse racing), a standardbred harness racing event open to all comers
Open class (track and field), an event classification
Open classes (programming languages), ability to extend already defined class
Open 60 Class, a type of monohull sailboat
FAI Open Class, a glider competition class with unlimited wingspan
IBM Open Class (IOC), a C++ class library
Open class system, a state of society

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