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In the mid-1930s, American scientist von Neumann boldly proposed to abandon decimal and use binary as the basis for the number system of digital computers. At the same time, he also said that the calculation program was pre-programmed, and then the computer performed the numerical calculation work according to the calculation order that people made beforehand. The main point of Von Neumann's theory is that the number system of digital computers uses binary; computers should be executed in program order. The theory of Von Neumann is called the von Neumann architecture. From ENIAC to the most advanced computers today, the von Neumann architecture is used. So von Neumann is the father of a well-deserved digital computer.

On February 14, 1946, the world's first electronic computer "ENIAC Electronic Numerical And Computer", customized by the US military, was introduced at the University of Pennsylvania. ENIAC was developed by the Aberdeen Weapons Test Site in the United States to meet the need for computational trajectory. The calculator uses 17,840 tubes, 80 feet by 8 feet, weighs 28 tons, and consumes 170 kW. For 5,000 additions per second, the cost is about $487,000. The advent of ENIAC has an epoch-making significance, indicating the advent of the electronic computer era.

In the more than 60 years since 1946, computer technology has grown at an alarming rate. 1st generation: digital tube digital machine (1946 - 1958); 2nd generation: transistor digital machine (1958 - 1964); 3rd generation: integrated circuit digital machine (1964 - 1970); 4th generation: large-scale integration Circuit machine (from 1970 to the present). At the beginning of 1990, Bell Labs made the world's first photonic computer. A photonic computer is a new type of computer that performs digital operations, logic operations, information storage and processing from optical signals. Since photons are faster than electrons, photonic computers can run at speeds of up to one trillion times. It is tens of thousands of times more storage than modern computers, and it can recognize and synthesize language, graphics and gestures. With the combination of modern optics and computer technology, microelectronics technology, photonic computers will become universal tools in the near future.

A quantum computer is a computer with a new concept of information processing using the quantum properties of atoms. According to quantum theory, under non-interaction, an atom is in two states at any moment, called a quantum superstate. The atom will rotate, that is, it will spin in both the upper and lower directions, which exactly coincides with the computer 0 and 1. If a group of atoms are brought together, they will not perform linear operations like electronic computers, but all possible operations at the same time. For example, quantum computers process data without stepping through but at the same time. As long as 40 atoms are calculated together, it is equivalent to the performance of a supercomputer today. Quantum computers use quantum atoms as the central processor and memory. The computing speed may be 1 billion times faster than the Pentium 4 chip. Just like an information rocket, it searches the entire Internet in an instant and can easily crack any secure password. Hackers The task is easy.

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