²³ John F. Gantz, Christopher Chute, Alex Manfrediz, Stephen Minton, David Reinsel, Wolfgang Schlichting, and Anna Toncheva, “The Diverse and Exploding Digital Universe, An Updated Forecast of Worldwide Information Growth Through 2011,” IDC, March 2008, http://www.emc.com/collateral/analyst-reports/diverse-exploding-digital-universe.pdf, page 2.