I

• IEEE Electronic Library (IEL)

  IEEE is currently the world's largest non-profit professional technical society, with over 450000 members in more than 160 countries worldwide.

• IGI Global e-Book Collection

  Headquartered in Hershey, Pennsylvania, IGI Global is a leading international academic publisher committed to facilitating the discovery of pioneering research that enhances and expands the body of

• IOP ebooks

  The IOP ebooks™ collection brings together innovative digital publishing with leading authors from across the physical sciences.

• iresearch爱学术外文电子书

  爱学术（iresearch）是中国教育图书进出口有限公司打造的外文原版电子书库，作为本地化的集成平台，旨在汇聚世界领先出版社的优质电子图书资源，为读者提供丰富的外文学术研究参考文献，平台具备英文阅读过程中的标注、翻译等辅助功能，能让英文阅读更加便利。