| Acronym | Meaning |
| HSI | Hyperthermal Surface Ionization |
| ORSTB | Overlap-reduced Semiempirical Tight-binding |
| MPR | Magnetic Permeability Resonance |
| BIXE | Bombardment-induced X-ray Emission |
| MECS | Manufacturing Energy Consumption Survey (DOE) |
| GTP | Guanosine 5'-triphosphate |
| OPPE | Office Of Policy |
| CCCC | Complex-coordinate Coupled-channel (method In Calcns. On Rotational And Vibrational Predissocn.) |
| EFC | European Federation Of Corrosion |
| WISE | Wide-field Infrared Survey Explorer |