| Acronym | Meaning |
| REP | Radiological Emergency Planning |
| CA | Collision Activation |
| ETANN | Electronically Trainable Analog Neural Network |
| RFB | Recycle Fluidized-bed |
| GIPQ | Gage Invariant Periodic Quantization |
| CLOS | Common Lisp Object System (language) |
| FEBD | Fluid Extraction Biological Degradation Process For Organic Wastes |
| LBW | Laser-beam Welding |
| DRIS | Double Resonance Ionization Spectroscopy |
| AASIR | Advanced Atmospheric Sounding And Imaging Radiometer |