Colleen Kennedy, the Director of the DeVry Kansas City Library has published Instructions which also includes an excellent description of the product. The site provides links to free sources for online reference, materials for librarians, magazines and serials, newspapers, online texts and web searching.
Registration is free.
These hubs provide links to online texts and other resources. EMC for engineering, mathematics and computing. Centers include Library, History, Arts, Science, and Literature . See the page, Works by Author , for links to authors and titles. The Librarians'Index to the Internet maintains a list of at least 84 resources for Authors .