Household use of broadband internet service has risen dramatically during the first decade of the 21st century as the internet has become integral to the lives of most Americans. Nonetheless, not everyone uses broadband internet, either by choice or because they lack access. This book explores the studies that have shown that broadband internet use varies significantly across households of different socio-economic backgrounds and in different geographic locations. While broadband internet access rose between 2007 and 2009 for most demographic groups and geographic areas, persistent differences in levels and growth rates remained