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In page Apple II:

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Specialty peripherals kept the Apple II in use in industry and education environments for many years after Apple Computer stopped supporting the Apple II.[citation needed] Well into the 1990s every clean-room (the super-clean facility where spacecraft are prepared for flight) at the Kennedy Space Center used an Apple II to monitor the environment and air quality.[citation needed] Most planetariums used Apple IIs to control their projectors and other equipment.[5]