Tell me about the development history of information technology? What five information technology revolutions have you experienced?

The first time is the use of language, which has become an indispensable tool for human beings to exchange ideas and spread information. (Time: Post-Babel Era)

The second time was the appearance and use of characters, which made a great breakthrough in the preservation and dissemination of information, greatly exceeding the limitations of time and region. (Time: Iron Age, about BC14th century)

The third time was the invention and use of printing, which made books, newspapers and periodicals an important medium for information storage and dissemination. (Time: In the 6th century A.D., China began to have rigid printing, and it was not until the 5th century A.D./KLOC-0 that it entered the perfect modern printing. )

The fourth time was the use of telephone, radio and television, which made mankind enter the era of using electromagnetic waves to spread information. (Time:19th century)

The fifth is the use of computers and the Internet, that is, the emergence of the Internet. (Time: Modern, marked by the advent of 1946 electronic computer)