十九世纪二十年代 Charles Babbage Difference Engine Designed to calculate the entries of a table automatically and transfer them via steel punches to an engravers plate Could perform only addition and subtraction Using Finite Difference methods a large number of functions could be calculated . Polynomials .Trigonometric Functions Used a number of mechanical registers Driven by steam engine to CRANK oUT the results 3rd degree polynomials and 15 digit numbers Automatic multistep operations
Babbage差分机 1832
1834 Babbage分析机 The mill The Store Printer Punch Operation Variable Cards Cards Program
MT差分分析机 (1930) the MtI Iitterential Analvzer l19s) Tris room sized ach inc was built in 1930 by MII mathema ician vannevar Bush. The basic exrFutalienal engine mechamical but the machine used velum tales dthen a relatively nev 时 tnan s L3 te careys
1、第一代电子计算机(1946-1958) 2、第二代电子计算机(1959-1964) 第三代电子计算机(1965-1970) 4、第四代电子计算机(1971-1989) 5、发展中的计算机科学技术
1、第一代电子计算机（1946-1958） 2、第二代电子计算机（1959-1964） 3、第三代电子计算机（1965-1970） 4、第四代电子计算机（1971-1989） 5、发展中的计算机科学技术