The most prominent dispersion correction schemes, which can be added to established DFAs, can be classified into the four groups 386 : (i) nonlocal, density-based functionals (e.g., vdW-DF or VV10), (ii) C 6 -based, atom-pairwise semiclassical models (e.g., D3/D4, XDM, TS/MBD), (iii) one-electron effective potentials, and (iv) highly parameterized density functionals (e.g., M06). Some of these methods, which mostly contain empirical components, yield very accurate long-range interactions, close to coupled-cluster accuracy (with a typical relative error of less than 5%) at low, often negligible computational cost.