| Acronym | Meaning |
| MSMA | Murrell-Shaw-Musher-Amos Exchange Perturbation Theory |
| MEP | Multiple Extraction Procedure |
| FBR | Fixed Bed Reactor |
| MPO | Metropolitan Planning Organization |
| NPA | Natural Population Analysis (for Electron Configuration Of Mols.) |
| PMPIN | Pre-Manufacturing And Pre-Importation Notification |
| TPA | Terephthalic Acid |
| SWVP | Scattered Wave Variational Principle |
| NCCCS | Northern California Coastal Circulation Study |
| IECA | International Erosion Control Association |