In addition to a history of the "DARE" project and its fieldwork, it includes introductory matter from the first print volume, an Index of virtually all the regional, social, usage, and etymological labels in the five volumes of text, a pronunciation guide and abbreviation list, the Questionnaire and List of Informants, and all the contrastive maps that are included in Volume VI of the print version of "DARE". There is an "Introduction to Contrastive Maps," followed by about 1,400 geographic maps showing regional synonyms for various concepts, and more than 300 maps showing differences in usage by people according to their age, sex, race, education, and community type. An index follows, with all the words that are mapped, making it easy to start with a question about a specific term and go directly to a regional or social map.