| Acronym | Meaning |
| PDR | Photon-dominated Region |
| PSS | Primary Sewage Sludge |
| ACQM | Arrangement-channel Quantum Mechanics |
| BLTM | Branched Lagrangian Transport [model] |
| DBDPO | Decabromodiphenyl Oxide |
| TFTR | Tokamak Fusion Test Reactor |
| LIBD | Laser-induced Breakdown Detection |
| ESW | Electroslag Welding |
| DLD | Decoupled L-dominant Method (in Inelastic-scattering Calcns. |
| EFISPS | Electric Field Induced Surface Photovoltage Spectroscopy |