| Acronym | Meaning |
| HPM | Hypervirial-perturbative Method |
| TCSCF | Two-configuration Self-consistent Field Procedure |
| SOGVB | Spin Optimized Generalized Valence Bond Method |
| TSH | Tensor Surface Harmonic (method In Bonding Of Metal Clusters) |
| JME | Juvenile Myoclonic Epilepsypar |
| HFET | Heterostructure Field Effect Transistor |
| RSM | Reduction Symmetry Method (in Crystal Field Theory) |
| LSTH | Liu-Siegbahn-Truhlar-Horowitz (potential-energy Surface) |
| WMO | World Meteorological Organization |
| TWTDS | Treatment Works Treating Domestic Sewage |