This document provides an overview of the field of applied linguistics. It defines applied linguistics as using linguistic theories, methods and findings to explain and solve language problems that arise in other domains. The primary concerns of applied linguistics are second language acquisition theory, second language pedagogy, and their interrelationship. The document outlines several domains of applied linguistics, including language teaching and learning, testing, sociolinguistics, and computational linguistics. It also discusses the interdisciplinary nature of applied linguistics and how it combines with fields like psycholinguistics and neurolinguistics. The overall aim is to investigate language learning and teaching problems and find practical solutions.
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