The third, completely revised and expanded edition of the textbook offers a comprehensive introduction to the key areas of Applied Linguistics. In 28 individual articles, linguistic concepts, methods, and findings are presented that contribute to solving everyday language and communication problems. The content is illustrated and deepened with typical case studies from various fields of work. The new contributions on linguistic methods for automatic text processing, corpus-based language analysis, and medical expert-lay communication address topics that have become relevant for research and practice in Applied Linguistics in recent years. The updated and supplemented CD-ROM includes exercises with solutions for each chapter, as well as additional text and audio content.