| Acronym | Meaning |
| CSA | Coupled-subshell Approxn. (in Calcns. On Inner-shell Ionization Collisions) |
| GFFF | Gravitational Field-flow Fractionation |
| EPSC | Excitatory Postsynaptic Current |
| LEPD | Low Energy Photon Detector |
| CRMMA | Chemical Reference Material Manufacturers Association |
| LIRE | Laser Ionization Recombination Emission |
| ELARP | Experimental Lakes Area Reservoir Project |
| FLN | Fluorescence Line Narrowing |
| SAWD | Solid Amine Water Desorbed |
| HSCR | Hirschsprung Disease |