From the article:
We live in an information-driven world-- one in which access to good information defines success. OAIster's growth to 10 million records takes us one step closer to that goal.
Developed at the University of Michigan's Library, OAIster is a collection of digital scholarly resources. OAIster is also a service that continually gathers these digital resources to remain complete and fresh. As global digital repositories grow, so do OAIster's holdings.
Popular search engines don't have the holdings OAIster does. Theycrawl web pages and index the words on those pages. It's an outstanding technique for fast, broad information from public websites. But scholarly information, the kind researchers use to enrich their work, is generally hidden from these search engines.
OAIster retrieves these otherwise elusive resources by tapping directly into the collections of a variety of institutions using harvesting technology based on the Open Archives Initiative (OAI) Protocol for Metadata Harvesting. These can be images, academic papers, movies and audio files, technical reports, books, as well as preprints (unpublished works that have not yet been peer reviewed). By aggregating these resources, OAIster makes it possible to search across all of them and return the results of a thorough investigation of complete, up-to-date resources.