| Acronym | Meaning |
| GRIN | Graded Index |
| IAVCEI | International Association Of Volcanology And Chemistry Of The Earth's Interior |
| RPSA | Rapid Pressure Swing Adsorption |
| DOP | Dioctyl Phthalate |
| CNPPA | Commission On National Parks And Protected Areas |
| CCPE | Charge Core Potential Energy Method (for Conformational Analysis) |
| WWM | Wigner-Weyl-Moyal (formalism In Quantum Mechanics) |
| BEST | Basic Extractive Sludge Treatment |
| SOS | Southern Oxidant Study |
| SHS | Self-propagating High-temperature Synthesis |