1. 1.The three other prominent geodemographic segmentation systems that followed PRIZM were ACORN from CACI, Clusterplus from Donnelley Marketing, and MicroVision from Equifax.
2. 2.Weiss, M.J., The Clustering of America, Harper & Row, New York, NY, 1988.
3. 3.In the UK, the generational name preferences are particularly strong. One mailing list company has seized on this fact to impute an individual’s age from his/her first name in certain instances. For example, there are few Lisas older than 30 in the UK.