| Acronym | Meaning |
| FASS | Field-amplified Sample Stacking |
| FGDIS | Flue Gas Desulfurization Information System |
| HUD | Housing And Urban Development |
| LAAFS | Laser Ablation Atomic Fluorescence Spectroscopy |
| EBR | Experimental Breeder Reactor |
| LIF | Laser Induced Fluorescence |
| SPHINCS | Sequential PHoton Interrogation And Neutron Counting Signatures |
| TRI | Toxic Release Inventory |
| CFB | Continental Flood Basalt |
| PKI | Public Key Infrastructure |