| Acronym | Meaning |
| ENCAT | Epoxy Nucleophile Catalyzed Transesterification |
| SCPA | Self-consistent Phonon Approximation (for Lattice Dynamics Of Quantum Crystals) |
| IMS | Incomplete Model Space (in Many-body Calcns.) |
| ODC | Orientation Distribution Coeffs. |
| NOAO | National Optical Astronomy Observatories |
| ALP | Alkaline Phosphatase |
| HMPT | Hexamethylphosphoric Triamide |
| DEM | Distinguishable Electron Method |
| NEDS | National Emission Data System (USEPA) |
| IX | Ion Exchange |