In a hybrid system, a classical computer and a quantum computer work in tandem. The classical computer performs the bulk of the computational workload, while the quantum computer tackles problems that are inherently quantum mechanical. For instance, in the context of nanotechnology, a classical computer might manage the macroscopic properties of a material, while the quantum computer models its atomic interactions. Data is exchanged between the two systems through quantum-classical interfaces, ensuring that each subsystem operates within its optimal computational domain.