OCM	Open-Closed Method
opM	Ortho-Para Method
RRM	Related Rotamers Method
GCM	Geometry-Corrected Method
GCRRM	Geometry-Corrected Related Rotamers Method
RBM	Rotation Barriers Method
DM	Dimer Model
IRM	Isodesmic Reactions Method
EM	Espinosa’s Method
QTAIM	Quantum Theory of Atoms in Molecules
IQA	Interacting Quantum Atoms
BP	bond path
BCP	bond critical point