This document provides an overview of the field of linguistics. It discusses the goals of linguistics as analyzing language structure through valid models. It describes the main levels of linguistic analysis including phonetics, phonology, morphology, syntax, semantics, and pragmatics. It also outlines several areas of linguistics such as sociolinguistics, language acquisition, and language change. The document provides examples to illustrate linguistic concepts like phonetic transcription and syllable structure. It gives a brief history of theories in linguistics from early non-theoretical studies to modern generative grammar.