| Acronym | Meaning |
| MRINDO | Modified Rydberg Intermediate Neglect Of Differential Overlap |
| MW | Molecular Weight |
| AHW | Atomic Hydrogen Welding |
| 3DWQM | Chesapeake Bay Three Dimensional Time Variable Water Quality Model |
| CETA | Carbon Emission Trajectory Assessment Model |
| FARM | Fixed-angle Reactor Model (in Quantum Calcns. On Reactive Scattering) |
| LPA | Low Profile Additive [in Plastic Composites] |
| MMA | Manual Metal Arc Welding |
| PEEM | Panel Of Experts On Environmental Management |
| IPPP | Isopropylphenyl Phosphate |