The document outlines 11 sub-areas of linguistics: Evolutionary Linguistics examines the origin of language; Historical Linguistics explores language changes over time; Sociolinguistics looks at the relationship between linguistic variation and social structures. It also discusses Psycholinguistics, Neurolinguistics, Anthropological Linguistics, Applied Linguistics, Biolinguistics, Clinical Linguistics, Linguistic Typology, and Stylistics - each exploring a different focus area relating to language.