- A qubit, or quantum bit, is the basic unit of information in quantum computing. - Unlike a classical bit which can represent either 0 or 1, a qubit can represent 0, 1, or a superposition of both states simultaneously. - Qubits leverage quantum mechanical phenomena like superposition and entanglement to perform computations fundamentally different from classical computers. - Cloud Services, Visible Light Communication, and Wireless Communication Technologies are related to classical computing and communication paradigms, where the basic unit of information is the classical bit.