| Acronym | Meaning |
| IGCAR | Indira Gandhi Center Atomic Research |
| IPDA | Intensified Photodiode Arrays |
| IRI | International Reference Ionosphere |
| GDP | Glow Discharge Plasma (for Atomic Emission Spectrometry) |
| PSA-CCSD | Partially Spin Adapted-CCSD |
| TFA | Trifluoroacetic Acid |
| MOPITT | Measurements Of Pollution In The Troposphere |
| ZORA | Zeroth-order Regular Approximation |
| EIAES | Electron Induced Auger Electron Spectroscopy |
| ANR | Adiabatic Nuclear Rotation (in Calcns. On Mol. Collisions) |