Languages and linguistics -- Words and their parts : lexicon and morphology -- The sounds of languages : phonetics -- Sound systems of language : phonology -- The structure and function of phrases and sentences : syntax -- The study of meaning : semantics -- Language universals and language in typology -- Information structure and pragmatics -- Speech acts and conversation -- Language variation across situations of use : registers -- Language variation among social groups ; dialects -- Language change over time : historical linguistics -- Historical development in English -- Acquiring first and second languages.