Neighbourhood and dwelling classification : Divides the market into groups, based on the assumption that the type of dwelling and area a person lives in is a good predictor of their purchasing behaviour including the types of products and brands they might purchase. The ACORN system as it is known (A Classification of Residential Neighbourhoods) classifies homes, rather than individuals, as a basis for segmentation. It analyses the 10-yearly population census that is undertaken during every year ending with one - the most recent census data being generated in 2001. The system was developed by Richard Webber for Consolidated Analysis Centres Incorporated (CACI). It breaks down the census of population into various categories of homes as shown in the table below. - See more at: http://www.examstutor.com/business/resources/studyroom/marketing/market_analysis/7_demographic_segmentation.php#sthash.VYe1Z2oW.dpuf