| Acronym | Meaning |
| SRM | Single Residue Method |
| PBX | Plastic Bonded Explosive |
| SDA | Structure-directing Agent |
| DLA | Diffusion-Limited Aggregation |
| CFPP | Cold Filter Plugging Point |
| PLI | Process Loading Intensity (of Biological Reactors) |
| PO | Projection Operator |
| PSRP | Process To Significantly Reduce Pathogens (of EPA) |
| HFO | Hartree-Fock Orbital |
| PIPICO | Photoion-photoion Coincidence |