Figure shows the characteristic isosurface between two bonded atoms with double, triple, and quadruple bonds using both SCI and ELF indexes with the shape of dumbbell, torus, and four-beans, respectively. These isosurfaces are the same for other systems with the same bond multiplicity. The downside of these two indexes is that they cannot identify single bond and noncovalent interactions. Is it possible to simultaneously identify both bonding and noncovalent interactions with density-based descriptors? Our recent study introduced two other indexes, BNI and USI, and the answer to that question is yes. Shown in Fig. is the relationship of these four indexes in the coverage of the interaction spectrum.