The document discusses the principal types and variations of English pronunciation. It notes that there are four components of phonetic structure - phonemic, syllabic, accentual, and intonational - that constitute a language's pronunciation. Accents refer solely to pronunciation differences, whereas dialects involve differences in vocabulary, grammar, and word order as well. There are many accents within England, Britain, and across the other regions of the UK, with Northern and Southern accents being a broad distinction in England. The study of variations in accents was traditionally part of dialectology, which aimed to identify all geographical differences in a language.