Open class may refer to:
- Open class (linguistics), a word class readily accepting new items
- Open (sport)
- Open class (track and field), an event classification
- Open 60 Class, a type of monohull sailboat
- FAI Open Class, a glider competition class with unlimited wingspan
- Open class (computer programming), the ability to extend already-defined classes
- IBM Open Class (IOC), a C++ class library
- Open class system, a state of society
This disambiguation page lists articles associated with the title Open class.
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