21. Several analog computers were constructed in ancient and medieval times to perform astronomical calculations. 22. Any physical process which models some computation can be interpreted as an analog computer . 23. 2D animation has many applications, including analog computer animation, Flash animation, and PowerPoint animation. 24. :Analog computers were once used to solve differential equations. 25. She spent time working on mathematical analysis problems for clients and ran an analog computer . 26. Mechanical analog computer devices appeared again a thousand years later in the programmable analog computer . 27. Educational analog computers illustrated the principles of analog calculation. 28. Mechanical analog computer devices appeared again a thousand years later in the programmable analog computer. 29. The first major achievements in the field were associated with the building of analog computers . 30. To perform these tasks Lebedev developed an analog computer system to solve ordinary differential equations.
