| Acronym | Meaning |
| NRMS | Neutralization-reionization Mass Spectrometry |
| GCC | Global Climate Coalition |
| HLBR | Required Hydrophilic-lipophilic Balance (of Surfactants In Emulsifiers) |
| MIBD | Micro-interferometric Backscatter Detection |
| PSHF | Pseudospectral Hartree-Fock |
| RVR | Renal Vascular Resistance |
| GIAO | Gage-independent Atomic Orbital |
| DRF | Direct Reaction Field (for Intermol. Interactions) |
| MAR | Matrix Attachment Region |
| RDA | Representational Difference Analysis |