SCI (scientific citation index), EI (engineering index) and ISTP (scientific conference record index) are three world-famous scientific and technological literature retrieval systems, which are internationally recognized as the main retrieval tools for scientific statistics and scientific evaluation. The following small series will introduce you separately.

SCI(ScienceCitationIndex) is a citation database created and published by institute for scientific information (ISI) 196 1. It was founded according to the citation thought put forward by modern information scientist Engenegarfield in 1953. Today Garfield is still one of the editors of SCI. SCI is published by isi (institute for scientific information Inc.). It's bimonthly. In addition to publishing SCI, ISI also has an online database SCISEARCH. ISTP (scientific index & ampTechnicalProceeding) is also published by it. SCI is an international index, including natural science, biology, medicine, agriculture, technology and behavioral science. , mainly based on basic science. The selected publications come from 94 categories, more than 40 countries and more than 50 languages. These countries mainly include the United States, Britain, the Netherlands, Germany, Russia, France, Japan, Canada and so on. , including a certain number of China publications.