What technologies does information technology include?

Information technology refers to the technology of information collection, identification, extraction, conversion, storage, transmission, processing, retrieval, detection, analysis and utilization. All departments involved in these processes and technologies can be called information departments. Information technology can extend or expand people's information function. Information technology may be mechanical or laser; It may be electronic or biological. Information technology mainly includes sensing technology, communication technology, computer technology and microform technology.

The task of sensing technology is to extend the information collection function of human sensory organs; The task of communication technology is to expand the function of human nervous system to transmit information; Computer technology extends the function of human thinking organs to process information and make decisions, while microfilm technology extends the function of human memory organs to store information. Of course, this division is only relative and general, and there is no clear boundary. For example, there are also information processing and collection in the sensing system, while there are both information transmission and information collection problems in the computer system.