| Acronym | Meaning |
| PEDRI | Proton-electron Double-resonance Imaging |
| CIDR | Center For Inherited Diseases Research |
| OCTA | Oxidizing Capacity Of The Tropospheric Atmosphere |
| FCC | Face Centered Cubic |
| LPP | Laser-produced Plasma |
| SPIE | Society Of Photo-Optical Instrumentation Engineers |
| LSDXS-SIC | Local-spin-density (with) Screened Exchange (and) Self-interactiond Correction |
| PI | Polydispersity Index |
| CASS | Cyclic Activated Sludge System |
| PGP | Previous Glacial Period (glacial Maximum Of O18 Stage 6; Predates The LGM) |