Fundamentals of Data Structures by Ellis Horowitz and Sartaj Sahni, published in 1976, is a seminal textbook that offers an in-depth exploration of data structures, a core concept in computer science. The book covers a wide range of data structures, including arrays, stacks, queues, linked lists, trees, and graphs, along with algorithms for their manipulation and application. It emphasizes both the theoretical foundations and practical implementation, providing detailed explanations, examples, and exercises to help readers develop strong programming and problem-solving skills. This work is widely regarded as an essential resource for students and professionals in computer science.