What is the history of the invention of computers?

In the 1940s and 1950s, it was the first generation of electron tube computers. With the development of electronic tube digital computer, transistor digital computer, integrated circuit digital computer and large-scale integrated circuit digital computer, computer technology has gradually matured.

2. Small computer stage

In the 1960s and 1970s, the mainframe was miniaturized for the first time, which could meet the information processing needs of small and medium-sized enterprises and institutions with low cost and acceptable price.

3. Microcomputer stage

In the 1970s and 1980s, it was the second time to downsize the mainframe. 1976 The American Apple Company was founded, and 1977 introduced the AppleII computer, which was a great success. 198 1 year, IBM introduced IBM-PC. After several generations of evolution, it occupied the personal computer market and made personal computers very popular.

4. Client/Server

That is, the C/S stage. With the establishment of the first global online booking system between IBM and American Airlines in 1964, more than 2,000 booking terminals in the United States were connected by telephone lines at that time, which marked that computers entered the client/server stage. This mode is still widely used today. In the client/server network, the server is the core of the network, and the client is the foundation of the network. The client relies on the server to obtain the required network resources, and the server provides the necessary network resources for the client. The advantage of C/S structure is that it can give full play to the processing power of the client PC, and a lot of work can be submitted to the server after the client processing, which greatly reduces the pressure on the server.

5. Internet stage

Also known as Internet, Internet and Internet Stage. Internet is an international computer network composed of wide area network, local area network and single computer according to certain communication protocols. The Internet started at 1969, and under the agreement made by the Defense Research Projects Agency, it connected the main computers of four universities in the southwestern United States (UCLA), (Stanford University Research Institute), (University of California) and (University of Utah). Since then, from words to pictures, and now it has gone through the stage of voice and video, broadband is getting faster and faster, and its functions are getting stronger and stronger. The characteristics of the Internet are: global, massive, anonymous, interactive, growing, flat, instant, multimedia, addictive and noisy. The importance of the Internet should not be underestimated. This is a solid step towards the global village.

6. The era of cloud computing

Since 2008, the concept of cloud computing has gradually become popular, and it is becoming a popular and popular word. Cloud computing is regarded as a "revolutionary computing model" because it enables supercomputing power to circulate freely through the Internet. Enterprises and individual users no longer need to invest in expensive hardware purchase costs, but only need to purchase rental computing power through the Internet. Users only need to pay for the functions they need, while eliminating the cost of traditional software in hardware, software and professional skills. Cloud computing allows users to get rid of the complexity of technology and deployment and get applications. Cloud computing, including development, architecture, load balancing and business model, is the future model of software industry. Its service is web-based and internet-centric.