This chapter provides an in-depth introduction to quantum computing, covering its fundamental principles, hardware components, and key algorithms. The chapter begins with an overview of quantum computing, explaining its basis in quantum mechanics and the concepts of qubits, superposition, and entanglement. It then explores the hardware requirements for quantum computers, including quantum processors and the technologies needed to maintain qubit coherence. The discussion progresses to quantum algorithms, highlighting their potential to revolutionize computation, particularly in fields like cryptography and optimization. The chapter also examines quantum computing applications across various industries, from healthcare to finance, and addresses the challenges and limitations currently facing the field. Lastly, the chapter looks ahead to the future of quantum computing, discussing emerging trends and potential breakthroughs that could unlock new possibilities for computation.