| Acronym | Meaning |
| CCDW | Coupled-channel Distorted-wave (quantum Method) |
| TEMA | Tubular Exchanger Manufacturers Assocn. |
| MEKP | Methyl Ethyl Ketone Peroxide |
| HBJ | Hougen-Bunker-Johns (Hamiltonian For Mol. Calcns.) |
| UNFCCC | United Nations Framework Convention On Climate Change |
| IEMA | Immunoenzymometric Assay |
| SCAF | Self-consistent Anisotropic Field |
| RECA | Regional Energy Convergence Approxn. (in Total Energies Calcns.) |
| IPIECA | International Petroleum Industry Environmental Conservation Association |
| RRHO | Rigid Rotor-harmonic Oscillator (approxn.) |