| Acronym | Meaning |
| MSA | Mean Spherical Approxn. |
| MERIS | Medium Resolution Imaging Spectrometer |
| ASS | Argininosuccinate Synthetase |
| IMBPT | Interaction Many-body Perturbation Theory |
| SCM | Shell-correction Method (in Calcns. For Metal Clusters) |
| GJIC | Gap Junctional Intercellular Communication |
| GHF | Generalized Hellmann-Feynman (theorem) |
| ESTEC | European Space Research And Technology Centre |
| UEGO | Universal Exhaust Gas Oxygen Sensor |
| TSR | Thermal Shock Resistance |