Quantum oscillations are measured by sweeping the magnetic field at a fixed angle. Quantum oscillations appear in all thermodynamic quantities and in electrical resistance. In this chapter, we show that the resistance for low-dimensional electron systems exhibits a peculiar oscillatory behavior as a function of the magnetic field angle, which is called the angle-dependent magnetoresistance oscillation (AMRO). The AMRO is ascribed to the periodic orbital motion of the conduction electrons on the Fermi surface, which is not related to the Landau quantization, and arises even from open orbits on quasi-1D Fermi surface as well as from closed orbits on quasi-2D Fermi surface. From the AMRO we can determine not only the size but also the shape of the Fermi surface. The coherence of theInterlayer transport interlayer transport can also be discussed from the measurements.