Historyofcomputerdevelopment计算机发展史

1、By：xxx原创Computers are on almost every aspect of our daily lives. As like many ordinary objects around us.In industry，business，education，medicine，computer have been become a irreplaceable tool. abacus5th century BC, Chinese invented the abacus.It is widely used in commercial trade, and this is the fi

2、rst calculation tool.It is also considered the prototype of a computer.Pascaline（加法器）（加法器）Blaise Pascal( France)is usually credited for building the first digital computer in 1642. Pascal develops the machine because he had to help his father with his work as tax receiver. As the Pascaline was too e

3、xpensive，this machine was not popularized in large scale.but opened the way for more complicated counting machines by later generations of inventors.The addend and subtrahend machine In 1668, Samuel Morland who was English ，invented the addend and subtrahend .Sir Samuel Morland , of England, produce

4、s a non decimal adding machine, suitable for use with English money. Instead of a carry mechanism, it registers carries on auxiliary dials, from which the user must re-enter them as addends.Babbages Difference engine巴贝奇差分机巴贝奇差分机First general-purpose computing deviceThe Engine incorporated an arithme

5、tic logic unit, control flow in the form of conditional branching and loops, and integrated memory, making it the first design for a general-purpose computer that could be described in modern terms as Turing-completeENIAC (/ini.k/）Its the first electronic computer .The start of World War II produced

6、 a large need for computer capacity, especially for the military. New weapons were made for which trajectory tables and other essential data were needed. It could add or subtract 5000 times a second, a thousand times faster than any other machineThe first supercomputerThe CDC 6600, released in 1964,

7、 is generally considered the first supercomputerSupercomputers are used for a wide range of computationally intensive tasks in various fields, including weather forecasting, climate research, oil and gas explorationOver the last decade, the Chinese have steadily inched up in the rankings of supercom

8、puters.Largest Supercomputer Vendors according to the total Rmax (GFLOPS) operatedPersonal computerThe Programma 101 was the first commercial desktop personal computer, produced by the Italian company . The project started in 1962. It was launched at the 1964 New York Worlds Fair, and volume product

9、ion began in 1965.Achievements：NASA bought at least ten Programma 101s and used them for the calculations for the 1969 Apollo 11 Moon landing. ABC used the Programma 101 to predict the presidential election of 1968.The U.S. military used the machine to plan their operations in the Vietnam War.The future development trend of computerThe development of computer technol