| Acronym | Meaning |
| HSPF | Hydrological Simulation Program-Fortran |
| OSA | Optical Society Of America |
| FEF | Forced Expiratory Flow (lung Function) |
| PMO | Perturbational Molecular Orbital |
| PISCES | Passive In-Situ Concn. Extn. Sampler |
| UMINDO | Spin-unrestricted Modified Intermediate Neglect Of Differential Overlap |
| UEL | Upper Explosive Limit |
| CPM | Crucible Particle Metallurgy |
| IEM | Interstitial Electron Model |
| MPK | Methyl Propyl Ketone |