Data Structures Using C is designed to serve as a textbook for undergraduate engineering students of Computer Science as well as postgraduate students of Computer Applications. The book aims to provide a comprehensive coverage of the concepts of Data Structures. The book starts with a thorough overview of the concepts of C programming including Arrays, Pointers, Strings, and Functions. It then connects these concepts and applies them to the study of Data Structures by discussing key concepts like Linked Lists, Stacks and Queues, Trees, and Graphs. Detailed description of various functions in Data Structures like Sorting - both Internal and External, Hashing and Search Trees is provided. The book also provides a chapter on the attributes and organization of files. Written in a simple style, the book provides numerous examples, programmes and pseudocodes to illustrate the theoretical concepts. Several end chapter exercises including review questions, multiple choice questions is provided to help students practise the concepts.