| Acronym | Meaning |
| IUPAB | International Union Of Pure And Applied Biophysics |
| BALQSO | Broad Absorption Line Quasi-stellar Object |
| NDDN | National Dry Deposition Network (US EPA) |
| PSP | Progressive Supranuclear Palsy |
| IUCR | International Union Of Crystallography |
| SESAME | Simulation Of Electron Transport Supporting Analysis Of Materials |
| RLPPS | Reactive Low-pressure Plasma Spraying |
| CC-DQMC | Clamped-coordinate Diffusion Quantum Monte Carlo |
| SSC | Sudden Storm Commencement (magnetic Storm) |
| ERC | Emissions Reduction Credit |