This book introduces the fundamental concepts of data structures and algorithms. It covers topics such as arrays, linked lists, stacks, queues, trees, graphs, sorting, searching, and hashing. The book is written to help students and professionals in computer science and programming understand how to use data structures and algorithms to solve complex problems efficiently. Whether you are a beginner or an experienced programmer, this book provides valuable insights into the world of data structures and algorithms. Data structures are specialized formats for organizing, storing, and manipulating data in computer programs. There are several types of data structures, including arrays, linked lists, stacks, queues, and trees. Algorithms are a set of instructions or procedures that are designed to solve a specific computation problem. The discussion of the book starts with the fundamentals of data structures and algorithms, followed by the classification of algorithms used in data structures. Also, the concept of arrays and sets used in data structures and the selection of algorithms are described in detail in this book. The fundamental concept of two very important data structures, stacks, and queues, is also explained in detail. Another important data structure known as a tree, which consists of nodes connected by edges, is described in the book. The fundamental search algorithms that are used to locate an element within the structure are also part of this book. Lastly, the governance of algorithms and limitations of governance options are described in detail at the end of this book.