| Acronym | Meaning |
| FMM | Fast Multipole Method (algorithm For Coulomb Interactions Among Charge Distributions) |
| TAN | Total Acid Number |
| XMPA | X-ray Electron Microprobe Analysis |
| MULTIMED | Multimedia Exposure Assessment Model |
| NLGI | National Lubricating Grease Institute |
| HSES | Hydrostatic Equilibrium System |
| LDT | Light Duty Truck |
| DIHEN | Direct Injection High Efficiency Nebulizer |
| GRM | Geopotential Research Mission (USA Satellite) |
| PYS | Partial Yield Spectroscopy |