They know how to water your mouth (if you are into electronics, engineering, or any other scientific discipline): IEEE digitized several historic proceedings, starting with 1913's Proceedings of the IRE, and made them accessible through IEEEXplore. Read everything about the hot new stuff of our fathers and grandfathers, learn about the history of our now common gadgets and have insight into the very first articles on TV, the transistor and many other things. Only for IEEE members and only if you subscribed to the accordings journals! Great stuff! (Source)