| Acronym | Meaning |
| IOSA | Infinite Order Suden Approxn. (for Mol. Scattering Calcns.) |
| HZ | Hertz (one Cycle Per Second) |
| PSA | Potentiometric Stripping Analysis |
| NOMS | National Organics Monitoring Survey (US EPA 1976-1977) |
| BIND | Biomolecular Interaction Network Database |
| IVAP | Intimate Valence Alternation Pairs (bonding Model In Electronic Structure Calcns.) |
| DNO | Delocalized Natural Orbital |
| QUASIMEME | Quality Assurance Of Information For Marine Environmental Monitoring In Europe |
| PEM | Photoelectron Microscopy |
| CI-HY | Configuration Interaction-Hylleraas |