OAIster International Integrated Agency Knowledge Base
OAIster international integrated agency knowledge base is the project supported by the American Mellon Foundation in the Michigan University in 2002, which has been developed as the biggest open material database in the world, providing digital resources for researchers in many disciplines. There are nearly 330,000 entries from 1,100 libraries and research agencies, including digitized books and journals, original digital literature, audiovisual documents, images, film materials, data collections, articles, technology reports, research reports and so on. Every entry contains the link for the complete content of the digital resource and users can read, download and save a large amount of pictures and contents. The update frequency of the database is once per 3 months.