The first electronic computer was made shortly after the Second World War. At that time, with the development of artillery, trajectory calculation became more and more complicated, and some original computers could not meet the requirements of use, so a new fast calculation tool was urgently needed.
In this way, with the efforts of some scientists and engineers, on the basis that electronic technology has shown the functions of counting, calculation, transmission and storage control, electronic computers have emerged.
The world's first electronic computer was named "Eniac", which was successfully developed by eckert of the University of Pennsylvania in 1946. It is equipped with more than 18 000 electron tubes and a large number of resistors and capacitors, and it has been operated by electronic circuits for the first time. Eniac can do 5000 additions or 400 multiplications per second.
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The characteristics of the computer:
1, strong logical operation ability: the computer can not only calculate accurately, but also have logical operation function, which can compare and judge information. The computer can save data, programs, intermediate results and final results, and automatically execute the next instruction according to the judgment result for users to call at any time.
2. Large storage capacity: The internal memory of a computer has memory characteristics and can store a large amount of information, including not only various data information, but also programs for processing these data.
3. High degree of automation: Because the computer has the ability of memory and logical judgment, people can put the pre-programmed program group into the computer memory, and under the control of the program, the computer can work continuously and automatically without manual intervention.
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