1, the first information technology revolution was the use of language, which happened about 35,000-50,000 years ago.

2. The second information technology revolution was the creation of characters, which appeared around 3500 BC.

The third revolution of information technology is the invention of printing. Around 1040, China began to use movable type printing technology (Europeans began to use printing technology in 145 1 year).

4. The fourth information revolution was the invention and popularization of telegraph, telephone, radio and television, and the time was19th century.

The fifth information technology revolution began in 1960s, and its symbol was the popularization and application of electronic computers and the organic combination of computers and modern communication technology.

After computer networking, its development trend is as follows:

1, popularize wireless networking

Communication technology and network technology are integrated and further developed into a wireless network based on wireless fidelity technology. It can connect to the Internet at high speed anytime and anywhere through a laptop or other computing devices, without cables. Wireless fidelity technology will enable individuals to have the ability of network communication, which is a profound social progress.

2, the function is gradually improved

Due to the limitation of technology and infrastructure, the traditional network has defects in network security, scale, performance and service ability, and the future network will develop in a larger, faster, more timely, safer and more convenient direction.

3. Infinite expansion of energy

With the appearance of Internet, information resources have really become the third largest resource after material and energy. Computer network, especially since the commercialization of 1994 Internet, the influence of Internet revolution has shocked the world. With the application of network technology, the energy of computer has been expanded infinitely, and information resources have been fully utilized.

Because a well-designed network can implant the cumulative power of online into every single machine; The larger the network connected to the microcomputer, the more useful it is, and the more powerful it is. When you work online, you are not using a personal computer, but a huge computer with infinite expansion of energy.