| Acronym | Meaning |
| MODULUS | Methods Of Determining And Understanding Light Elements From Unequivocal Stable Isotope Compositions |
| ESAP | Environmental Self-assessment Program |
| CI | Chemical Ionization |
| ZRPA | Zero-range Potential Approximation |
| IAQMP | Indoor Air Quality Management Program |
| RNAP | RNA Polymerase |
| IEPA | Illinois Environmental Protection Agency |
| PWBA | Plane-Wave Born Approximation |
| WARMF | Watershed Anal. Risk Management Framework |
| CVM | Cluster Variation Method (in Calcns. On Semiconductors) |