Cover -- Contents -- Introduction -- I The Individual (One Person) -- 1 Mobile Phones, Sensors, and Lifelogging: Collecting Data from Individuals While Considering Privacy -- 2 Using Personal Data in a Privacy-Sensitive Way to Make a Person's Life Easier and Healthier -- II The Neighborhood and the Organization (10 to 1,000 People) -- 3 Gathering Data from Small HeterogeneousGroups -- 4 Engineering and Policy: Building More EfficientBusinesses, Enabling Hyperlocal Politics, LifeQueries, and Opportunity Searches -- III The City (1,000 to 1,000,000 People) -- 5 Traffic Data, Crime Stats, and Closed-Circuit Cameras: Accumulating Urban Analytics -- 6 Engineering and Policy: Optimizing Resource Allocation -- IV The Nation (1 Million to 100 Million People) -- 7 Taking the Pulse of a Nation: Census, Mobile Phones, and Internet Giants -- 8 Engineering and Policy: Addressing National Sentiment, Economic Deficits, and Disasters -- V Reality Mining the World's Data (100 Million to 7 Billion People) -- 9 Gathering the World's Data: Global Census, International Travel and Commerce, and Planetary-Scale Communication -- 10 Engineering a Safer and Healthier World -- Conclusion -- Notes -- Index.