Computational linguistics refers to the scientific study of language from a computational perspective. It is an interdisciplinary field the makes use of concepts from computer science, linguistics, logic, artificial intelligence, philosophy and cognitive science. Natural language processing deals with the study of interactions between human language and computers. It also involves the programming of computers for the processing and analysis of large amounts of natural language data. There are theoretical and applied components of linguistics. Theoretical computational linguistics involves the development of formal theories related to grammar and semantics. Within applied computational linguistics, the statistical methods and machine learning algorithms are applied to natural language processing tasks. This book studies, analyses and upholds the pillars of computational linguistics and its utmost significance in modern times. It provides significant information of this discipline to help develop a good understanding of computational linguistics and related fields. This book will provide comprehensive knowledge to the readers.