| Acronym | Meaning |
| PHF | Projected Hartree Fock |
| NDT | Nil Ductility Temperature |
| SNP | Sodium Nitroprusside |
| PGP | Previous Glacial Period (glacial Maximum Of O18 Stage 6; Predates The LGM) |
| TCCL | Toxic Chemicals Control Law (Korea) |
| PTMG | Polytetramethylene Glycol |
| NLMO | Natural Localized Mol. Orbital |
| TLEED | Tensor Low-energy Electron Diffraction |
| SUVA | Specific UV Absorbance |
| TD | Transmembrane Distillation |