| Acronym | Meaning |
| ADTT | Accelerator Driven Transmutation Technology |
| AAR | Accumulation-area Ratio (for Glaciers) |
| HMPSA | Hot-melt Pressure-sensitive Adhesive |
| MPAN | Peroxy Methacrolyl Nitrate |
| ERL | Environmental Research Laboratory |
| CIOS | Complex Infinite Order Sudden (approxn. In Quantum Calcns.) |
| MSPO | Method Of Successive P |
| ARPA | Augmented Random Phase Approximation |
| PEDRI | Proton-electron Double-resonance Imaging |
| HERL/MIS | Health Effects Research Laboratory Management Information System |