The history of the development of computers The shorter the better, no more than 800 words

In the 40-50s of the 20th century, it was the first generation of tube computers.

In the 60-70s of the 20th century, it was the first "downsizing" of the mainframe, which could meet the information processing requirements of small and medium-sized enterprises, and the cost was low and acceptable.

In the 70s and 80s of the 20th century, it was the second "downsizing" of the mainframe, and in 1976, Apple was established in the United States, and in 1977, the Appleii computer was launched, which was a great success. In 1981, IBM launched IBM-PC, and since then it has undergone several generations of evolution, occupying the personal computer market and making personal computers very popular;

So far, I have experienced the Internet, and in 2008 opened the era of cloud computing.

Hello, I hope my answer can help you.

1. The first generation: tube digital machine (1946-1958).

Features: large size, high power consumption, poor reliability. Slow (typically thousands to tens of thousands of operations per second), expensive, but laid the foundation for future computer development.

2. The second generation: transistor digital machine (1958-1964).

Features: Reduced size, reduced energy consumption, improved reliability, increased computing speed (generally 100,000 times per second, up to 3 million times), and greatly improved performance compared to the first generation computer.

3. The third generation: integrated circuit digital machine (1964-1970).

Features: Faster speed (generally millions to tens of millions of times per second), and reliability has been significantly improved, ** further declined, and the product has moved towards generalization, serialization and standardization. The application field began to enter the field of word processing and graphic image processing.

4. The 4th generation: large-scale integrated circuit machine (1970 to present).

Features: In 1971, the world's first microprocessor was born in Silicon Valley, ushering in a new era of microcomputers. The application field has gradually moved from scientific computing, transaction management, and process control to the home.

Computers came out in 1946, some people say that it was born due to the needs of war, and we believe that the fundamental driving force for computers is that people create more material wealth, in order to extend people's brains, and make people's potential to be more developed. Just as the invention of the automobile was to extend people's legs, the invention of the computer is in fact the inheritance and extension of the intelligence of the human brain.

The impetus generated by computers is that people want to invent a machine that can perform scientific calculations, hence the name computer. As soon as it was born, it immediately became the representative of advanced productive forces and opened up a new scientific and technological revolution since the industrial revolution.

To trace the invention of the computer, we can start from ancient China, when human beings invented the abacus to process some data, using the method of fiddling with the abacus, people do not need to do mental arithmetic, through a fixed formula can calculate the answer. This operational concept, known as "calculation and logical operation," was introduced to the West and developed by the Americans. It was not until the 16th century that a machine was invented to assist in the processing of more complex mathematical calculations such as multipliers, known as the "chessboard calculator", but this period was only in the stage of pure calculation, and it was not until the 19th century that it developed rapidly.