| Acronym | Meaning |
| PTEF | Photochem. Thermodynamic Efficiency Factor |
| IISI | International Iron And Steel Institute |
| GSNO | Ground-state Natural Orbital |
| HTS | High-throughput Screening |
| INDO/S | Intermediate Neglect Of Differential Overlap Screened Approxn. |
| OFDR | Off-frequency Decoupling Resonance |
| WILDCAT | Warning And Identification Lidar Detector For Countering Agent Threats |
| RXR | Retinoid X Receptor |
| DCID | Dimensionless Circular Intensity Difference |
| AFFF | Aqueous Film-forming Foam |