Kevin Calhoun
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John Kevin Calhoun was a programmer at Apple Computer. During his tenure at Apple he championed HyperCard and rose to be engineering manager of the HyperCard team and eventually manager of the QuickTime applications group, which included HyperCard. He left Apple in 2001. Calhoun was an active member of the HyperCard List, an early and popular email list. He was also one of the authors of the then-popular Dartmouth XCMDs, a set of command extensions for HyperCard.