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Big Data = Business Analytics
The only way I've heard Big Data used is in the marketing context; layering social media info, public data and private data. As Hiner's example, using your GPS location with public DOT travel estimates and the user's specific travel patterns. Old-school examples would be the fact that many people buy a new car within 6 months of buying a new house, so market cars to people who've taken out a mortgage in the past few months.