| Acronym | Meaning |
| ATM | Asynchronous Transfer Mode |
| PO-MO | Pars Orbital-MO |
| ELO | Equivalent Localized Orbitals |
| DFG | Difference Frequency Generation |
| RAS | Returned Activated Sludge |
| ETF | Exponential-type Function (an Ao) |
| NPCR | Nonlinear Principal Components Regression |
| ARF | ADP-ribosylation Factor |
| MRE | Mining Research Establishment |
| OMMSQA | Office Of Modeling |