Originally invented by john von neumann (at that time, the computing power of computers was equivalent to today's calculators), it was as big as three warehouses, and then it gradually developed.
It is an electronic device that can automatically process and process all kinds of data and information according to instructions.
It consists of several spare parts such as CPU, motherboard, memory, power supply and graphics card.
The scientific name of computer is computer, which is developed from the early electronic calculator. 1945, the first electronic digital computer "ENJAC" appeared in the world, which was used to calculate the trajectory. It is made by Moore Institute of Electrical Engineering, University of Pennsylvania, USA, but it is huge, covering an area of more than 500 square meters, weighing about 30 tons, and consumes nearly 100 kW of electricity. Obviously, this kind of computer. It is very inconvenient to use. 1956, the transistor electronic computer was born, which is the second generation electronic computer. It can be accommodated in several relatively large cabinets, and the operation speed is greatly improved. 1959, the third generation integrated circuit computer appeared.
This is the latest stage of computer development since 1970s. By 1976, "Cray I" made of large-scale integrated circuits and very large-scale integrated circuits made computers enter the fourth generation. With the invention of VLSI, electronic computers are constantly updated in the direction of miniaturization, miniaturization, low power consumption, intelligence and systematization.
In the 1990s, computers developed in the direction of intelligence, which made them similar to human brains, and could do thinking, learning, memorizing, network communication and so on.
2 1 century, computers are more notebook, miniaturized and specialized, and the operation speed exceeds 1 100 million times per second. It is not only easy to operate and cheap, but also can replace part of people's mental work and even expand people's intelligence in some aspects. Therefore, today's microelectronic computers are vividly called computers.
The first personal computer in the world was launched by IBM in 19 1 year.
Responder: surpass _ man- trainee wizard level 2 4-2 1 12:58.
An electronic computer, commonly known as a computer, is an electronic computing tool. In Chinese mainland, computers are usually called electronic computers. At present, an electronic computer is a device that processes information according to a preset program. Electronic computers are divided into supercomputers (also known as supercomputers), large computers, medium-sized computers, small computers and microcomputers (referred to as microcomputers), including personal computers and personal computers.
1from the mid-1930s to the late1940s, many people were developing modern, digital, electronic and universal electronic computers. Many experimental machines have been built and may be Turing-complete. These machines were declared as the first electronic computers at that time, but their ability to deal with general problems was limited, so their designs were finally abandoned.
The computer was invented in 1946. During the period of 1940- 1942, in order to control the flight of missiles, a tool that can calculate quickly is urgently needed. When it deviates from the track predicted by people, pull it back to the track. In this way, an electronic computer that can calculate the missile trajectory deviation from the predetermined trajectory within110 seconds or1100 seconds is produced. Electronic computers do not calculate in decimal, but in binary. Its appearance is one of the greatest inventions in the contemporary world. The inventor of the first computer was