| Acronym | Meaning |
| PMAD | Power Management And Distribution (system) (of Space Station) |
| PSEP | Polyhedral Skeletal Electron Pair (for Metal Clusters) |
| LEMAO | Least Energy Minimal Atomic Orbital |
| ARMA | Autoregressive-moving Average Stochastic Model |
| RNAP | RNA Polymerase |
| MI | Mitotic Index |
| HTOS | High Throughput Organic Synthesis |
| LSS | Laboratory Safety System |
| PBB | Polybrominated Biphenyl |
| MAGW | Momentum-averaged Gaussian-weighted (method In Calcns. Of Electron-momentum Distributions) |