How many kinds of information technology are there?

Any technology that can expand people's information function is information technology. It can be said that this is the basic definition of information technology. Mainly refers to the use of electronic computers and modern communication means to achieve information acquisition, information transmission, information storage, information processing, information display, information release and other related technologies.

Specifically, information technology mainly includes the following technologies:

1. Sensing and identification technology. Its function is to expand the function of human sensory organs in order to obtain information. It includes information identification, information extraction, information detection and other technologies. This kind of technology is collectively called "sensing technology". It can expand the perceptual function of almost all human sensory organs. Remote sensing technology combines sensing technology, measurement technology and communication technology, which further strengthens people's ability to perceive information.

Information recognition includes character recognition, voice recognition and graphic recognition. A method called "pattern recognition" is usually adopted.

2. The main function of information transmission technology is to realize the fast, reliable and safe transmission of information. All kinds of communication technologies fall into this category. Broadcasting technology is also a technology to transmit information. Since storage and recording can be regarded as an activity of transferring information from the present to the future or from the past to the present, it can also be regarded as an information transfer technology.

3. Information processing and regeneration technology Information processing includes encoding, compression and encryption of information. On the basis of information processing, some new and deeper decision information can be formed, which is called "information regeneration". The processing and regeneration of information depends on the extraordinary functions of modern electronic computers.

4. Information application technology is the last link in the information process. It includes control technology and display technology.

As can be seen from the above, sensing technology, communication technology, computer technology and control technology are the four basic technologies of information technology, among which modern computer technology and communication technology are the two pillars of information technology.