It was created in 1961, the founder of the U.S. Institute for Scientific Information director Eugene Garfield (1925.9.15). Using it, you can search for important academic results in mathematics, physics, chemistry, astronomy, biology, medicine, agricultural science, computer science, materials science and other disciplines since 1945; SCI is also used by domestic and foreign academics as an important basis for the formulation of disciplinary development planning and academic ranking.

2, Ei, that is, "Engineering Index", founded in 1884, edited and published by Elsevier Engineering Information Inc. It mainly contains papers in the field of engineering and technology (mainly scientific and technical journals and conference proceedings), and the data cover the fields of nuclear technology, bioengineering, transportation, chemical and process engineering, lighting and optical technology, agricultural engineering and food technology, computers and data processing, applied physics, electronics and communications, control engineering, civil engineering, mechanical engineering, materials engineering, petroleum, aerospace and automotive engineering, and other subject areas.

3, ISTP, that is, "Index to Scientific and Technical Proceedings", founded in 1978, compiled by the U.S. Institute for Scientific Information, mainly includes internationally renowned scientific and technological conference literature. It includes data on agriculture, environmental science, biochemistry, molecular biology, biotechnology, medicine, engineering, computer science, chemistry, physics and other disciplines. Between 1990 and 2003, ISTP and ISSHP (more on ISSHP later) *** included information on nearly 3 million papers from 60,000 conferences.