Quantum Information Science is an interdisciplinary field that combines principles of quantum mechanics with information theory. It explores how quantum systems can be used to process and transmit information more efficiently than classical systems, leading to advancements in computing and secure communication. This field encompasses various areas, including quantum computing, which utilizes quantum bits or qubits to perform calculations at unprecedented speeds, and quantum cryptography, which leverages the principles of quantum mechanics to create secure communication channels that are theoretically immune to eavesdropping.