| Acronym | Meaning |
| HFP | Hartree-Fock (plus) Pauli (terms) |
| UNFCCC | United Nations Framework Convention On Climate Change |
| RQDO | Relativistic Quantum Defect Orbital (method In Calcns. Of Oscillator Strengths) |
| CSP | Chiral Stationary Phase |
| SABRE | Sweden And Britain Radar Experiment |
| NLC | Noctilucent Cloud |
| IAC | Impregnated Activated Carbon |
| ISC | Intersystem Crossing |
| CRC | Combined Residual Chlorine |
| TARIS | Thermal Atomization Resonance Ionization Spectrometry |