What is the first computer recognized in human history?

The Antikythera mechanism (/ˌæntɪkɪˈθɪərə/ AN-tih-kih-THEER-ə) is an Ancient Greek hand-powered orrery, described as the oldest known example of an analogue computer[1][2][3] used to predict astronomical positions and eclipses decades in advance.[4][5][6] It could also be used to track the four-year cycle of athletic games which was similar to an Olympiad, the cycle of the ancient Olympic Games.[7][8][9]

The Antikythera mechanism, an astronomical clock, was built around 100 BC and is considered the world's first computer.