Single Molecular Rotor at the Nanoscale.- Rotary Motion in Single-Molecule Machines.- Molecular Machines and Motors Based on Transition Metal-Containing Catenanes and Rotaxanes.- Molecular Movements and Translocations Controlled by Transition Metals and Signaled by Light Emission.- Molecular Hysteresis by Linkage Isomerizations Induced by Electrochemical Processes.- Switchable Molecular Devices: From Rotaxanes to Nanoparticles.- Molecular-Level Artificial Machines Based on Photoinduced Electron-Transfer Processes.- Computing at the Molecular Level.- Molecular Memory and Processing Devices in Solution and on Surfaces.