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  2. Time clock - Wikipedia

    en.wikipedia.org/wiki/Time_clock

    The first punched-card system to be linked to a Z80 microprocessor was developed by Kronos Incorporated in the late 1970s and introduced as a product in 1979. Late 20th century. In the late 20th century, time clocks started to move away from the mechanical machines to computer-based, electronic time and attendance systems.