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Search over 3.5 million documents, plus patents and government data. Leading society publishers spanning 350 years of sci-tech scholarship help you with your queries.

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is the most comprehensive scientific research tool on the web. With over 410 million scientific items indexed at last count, it allows researchers to search for not only journal content but also scientists' homepages, courseware, pre-print server material, patents and institutional repository and website information.

"Sideways dictionary - it's like a dictionary, but using analogies instead of definitions. Use it as a tool for finding and sharing helpful analogies to explain technology. Because if everyone understands technology better, we can make technology work better for everyone."