| Acronym | Meaning |
| QCA | Quasichemical Approxn. (in Calcns. On Semiconductors) |
| IFSD | In-Flight Shutdown |
| DSMS | Depth-selective Moessbauer Spectroscopy |
| OPTS | Office Of Pesticides And Toxic Substances (USEPA) |
| MIAM | Modified Independent-atom Model (for Electron-mol. Scattering) |
| QCCA | Quasiclassical Close-coupling Approximation |
| SCC | Self-consistent Charge Method |
| PDF | Powder Diffraction File |
| IFFE | Immune Free Flow Electrophoresis |
| AME | Apparent Mineralocorticoid Excess |