The Nielsen Company - PRIZM™ Segment NarrativesPRIZM™ from Nielsen Claritas: defines every U.S. household in terms of 68 demographic and behavior types or segments to help marketers discern those consumers’ likes, dislikes, lifestyles and purchase behaviors.
http://www.geographicresearch.com/PDF/Nilesen_2011_PRIZM_Segment_Narratives.pdf