We offer our highest praise and gratitude to Almighty God, for by His grace and blessings the book entitled Applied Linguistics has been successfully completed and published. This book, Applied Linguistics, is a collaborative work written by academics and practitioners. Although it is far from perfect, we hope that this book can serve as a reference, reading material, and source of guidance for academics as well as professionals. The structure of this book is presented in eight chapters, covering: Introduction: What Is Applied Linguistics?, Language Teaching, Translation and Interpreting, Critical Rhetorical Skills in the AI Era: Analyzing Persuasive Discourse in the Context of Applied Linguistics, Lexicography, Language Policy, Forensic Linguistics, and Computer-Assisted Language Learning (CALL).