Making use of the Molpro program package capabilities, it is possible, for example, to include explicit correlation for the electronelectron interactions (NEO-PNO-LMP2-F12) in order to minimize the error of an incomplete basis set and to reduce the domain error. The computation of the electronic cor-relation energy can be further extended, for example, up to local coupled cluster with singles and doubles excitations and perturbative triples (PNO-LCCSD(T) and PNO-LCCSD(T)-F12). This involves the approximation that the electronic and nuclear amplitudes remain decoupled, following the idea of the NEO-DFT implementations where contributions from electronelectron and nuclear-nuclear interactions are treated independently from each other and are also not directly considered for the electronicnuclear correlation. The e cient implementations of both aforementioned programs have been described in detail by the group of Werner.