From the Greek astron “star” and lambanein “to take,” the astrolabe is an ancient astronomical instrument used for observing planetary movements. Astrolabes are amongst the most sophisticated scientific instruments ever made. Invented by the Greeks in about the second or third century BC, the astrolabe was further advanced by the Arabs in the eighth to eleventh centuries CE. […]

via Astrolabe – the first personal computer — Ismailimail