It is said, "One month of IT is equivalent to one social year." The domains of IT are expanding by each passing day, month and year. Everyday, newer application softwares are being developed, with programming as the base, which itself has its essentials in Data Structure and File Structure. A good programmer is expected to know both these skills. Standard softwares like Customer Relationship Management and ERP, which need Data Structures are in great demand. Even search engine programming needs Data Structure. Though Data Structure can be learned through any programming language, ?C? language renders the learning much easier and worthwhile. Students of various universities like IGNOU, MDU, KU, DU and others, and those preparing for different courses such as DOEACC, MCA, BCA, PGDCA, B. Tech. will find that their syllabuses are fully covered in this book. Those having the working knowledge of C programming and who have at least understood the pointers will be able to comprehend the complete programs and algorithms. Needless to say, these programs have been duly tested and algorithms have been written in a very simple form.