| Acronym | Meaning |
| HRCT | High-Resolution Computed Tomography |
| AQPS | Air Quality Prediction System |
| ABC | Avidin-biotin Complex |
| SPC | Statistical Process Control |
| PSRG | Position-space Renormalization Group (for D.-of-states Calcns.) |
| AFBS | Anaerobic Fluidized Bed Systems |
| DC | Direct Current |
| ESW | Electroslag Welding |
| INN | International Nonproprietary Names (for Drugs) |
| EHCO | Extended Hueckel Crystal Orbital |