11. The General Purpose Analog Computer was originally introduced by Claude Shannon. 12. It is considered an early example of a paper analog computer . 13. The Antikythera mechanism is believed to be the earliest known mechanical analog computer . 14. During the Middle Ages, several European philosophers made attempts to produce analog computer devices. 15. Analog computers can have a very wide range of complexity.16. The idea is to use ants like an analog computer version of a supercomputer. 17. Each turret was also installed with an optical range finder and ballistic analog computer . 18. In more sophisticated versions, analog computers replaced the electronic controller. 19. The DO-960 incorporates both digital computer and analog computer elements. 20. Electronic circuit instruments called analog computers were used to speed up circuit construction time.