Last September, two computer science students from the University of St. Andrews in the U.K. attempted to pin down a definition of Big Data, publishing “Undefined by Data: A Survey of Big Data Definitions” in the open-source journal arxiv.org. Their round-up included: 

Doug Fridsma, M.D., chief science officer for the ONC, has a definition that will resonate with almost everyone: “More data than you're used to--some people deal with petabytes and it's easy, but if you're a small practice, just your own data is more data than you're used to,” he says.

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