This document provides an introduction to the field of linguistics. It defines linguistics as the scientific study of language and notes that it has two main purposes: to study the nature of language and establish linguistic theories, and to examine how language is organized and the functions it serves. The document distinguishes linguistics from traditional grammar, noting that linguistics descriptively studies actual language use rather than prescribing rules. It also outlines the micro and macro areas of linguistics study, including phonetics, phonology, morphology, syntax, semantics, pragmatics, sociolinguistics, psycholinguistics, and others. Finally, it discusses how the study of linguistics benefits students of language, teachers of foreign language, and researchers