This class explores quantum transport in mesoscopic devices. It addresses quantum transport in clean systems, including quantum conductance interference effects in nanodevices such as Aharonov-Bohm effects, and quantum oscillations. Properties of two-dimensional electron gases and nanowire will be discussed. The effect of disorder is discussed from Knudsen regime, including size effects, to drift-diffusion model and quantum corrections to conductance including weak and strong localization, universal conductance fluctuation. Finally, single electron transistor, Coulomb and Pauli spin blockade regimes will be presented.