Cambridge University Press digitized all past volumes of all Cambridge journals available and dates back to the first volume of Volume I. Outstanding quality, easy retrieval, content-rich Cambridge Journal Back to Library resulting. The Cambridge Compilation Library, which contains 209 excellent journals, spanned from 1770 to 1996 and contained more than 630,000 articles and more than 4.3 million pages of data. Major subjects covered include: physics, materials science, agriculture and life sciences, medicine, ecology and environmental protection, linguistics, economics, political and international relations, history, Asian and Chinese studies, American studies, classical studies, philosophy , Sociology, law, music and theater, as well as mathematics, computer science, etc., most of which have a high retroactive value. Among them, the current periodicals of 151 kinds of journals were collected by SCI / SSCI / AHCI (JCR2010), and the percentage of them was 72.2%.