The invention and improvement of the steam engine pushed mankind to age of steam, and the social productive forces developed greatly.

the second industrial revolution

The application of electricity has brought mankind into the electrical age.

the third revolution of science and technology

The invention and application of electronic computers and the application of information technology have brought mankind into the information age.

Classification of science and technology

1, life science

2. Space science

3. Philosophy

4. Natural science

5. Humanities.

6. High-tech category