| Acronym | Meaning |
| PIXET | Proton Induced X-ray Emission Tomography |
| CIRS | Composite Infrared Spectrometer |
| BODC | Born-Oppenheimer Diagonal Correction (in Mol. Calcns.) |
| IIW | International Institute Of Welding |
| APD | Avalanche Photodiode |
| AFCRL | Air Force Cambridge Research Laboratories |
| QCA | Quantum-dot Cellular Automata |
| BOA | Bond Orbital Approximation |
| ASE | Amplified Spontaneous Emission |
| FESEM | Field Emission Scanning Electron Microscopy |