What is the name of the earliest calculating machine which was based on concepts found in modern computers but was unfortunately never built? A. Babbage's Difference Engine B. Pascal's Adder C. Leibnitz's Multiplier D. Differential Analyser E. None of the above
Difference Engine, an early calculating machine, verging on being the first computer, designed and partially built during the 1820s and '30s by Charles Babbage. Charles Babbage began to construct a small difference engine in c. 1819 and had completed it by 1822 (Difference Engine 0).
