| Acronym | Meaning |
| ESSESA | Expert System For Structure Elucidation From Spectral Analysis |
| APECS | Auger Photoelectron Coincidence Spectroscopy |
| PGS | Phosphosilicate Glass |
| ANPP | Aboveground Net Primary Production |
| UBFF | Urey-Bradley Force Field |
| PSP | Paralytic Shellfish Poison |
| RWA | Rotating Wave Approximation |
| APSG | Antisymmetrized Product Of Separated Geminals |
| PSNO | Pseudonatural Orbital |
| RDGTO | (back-)rotated Distributed Gaussian-type Orbital |