The calculation of Easter day, and the origin and use of the word computer

Like so many English words, computer derives from Latin and therefore traces its origins back many centuries. A link exists between it and Christianity´s greatest feast - Easter. In fact, the word computer, or at least its Latin equivalent, has long been connected to astronomy, time, and the calendar. We give a short history of the word, beginning from its use in early Roman times up to the introduction of the digital computer.