ISI selects periodical sources through its strict periodical selection criteria and evaluation procedures, with a slight increase or decrease every year, so that the literature collected by SCI can comprehensively cover the most important and influential research achievements in the world. Over the past 40 years, SCI database has been developing continuously, and it has become the most important large-scale database in the contemporary world, ranking first among six famous international retrieval systems (SCI, EI, CA, SA, AJ/р, JST) and three retrieval tools (SCI, EI, ISTP). It is not only an important retrieval reference book, but also an important basis for evaluating scientific research achievements. At home, after research by relevant departments and leaders of the Ministry of Science and Technology, it is decided to change the retrieval system of SCI papers statistics into SCIE from the statistical work in 2000. In other words, if an author's paper is included in SCIE after the 2000 edition, it is considered to be included in SCI. ?
Institute for scientific information (Institute for Scientific Information,? ISI) was founded by eugene garfield in 1960. 1992 was approved by Thomson Technology &; Healthcare acquisition, so it became known as Thomson ISI.
As for the present Thomson Reuters, the website/,was established on April 17, 2008. It is a commercial and professional intelligent information provider formed by the merger of Thomson Company and Reuters Group. Now Reuters is only a part of its news business.