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Zenith Supersport SX - Computing History. Zenith Supersport SX Zenith Data Systems (ZDS) was a division of Zenith founded in 1979 after Zenith acquired Heathkit, who had, in 1977, entered the personal computer market Headquartered in Benton Harbor, Michigan, Zenith sold personal computers under both the Heath/Zenith and Zenith Data Systems,