| Acronym | Meaning |
| APS | Active Pixel Sensor |
| RFQ | Radio-frequency Quadrupole |
| AFUP | Alternative Fuels Utilization Program |
| LFECA | Low Frequency Eddy Current Array |
| PCE | Tetrachloroethylene (perchloroethylene Or Perk) |
| EPSC | Excitatory Postsynaptic Current |
| AACE | American Association Of Coast Engineers |
| RRPA | Relativistic Random Phase Approximation |
| HCG | Human Chorionic Gonadotropin |
| FIFRA | Federal Insecticide |