| Acronym | Meaning |
| CSA | Coupled-subshell Approxn. (in Calcns. On Inner-shell Ionization Collisions) |
| PO-TDSE | Periodic Orbit-time Dependent Schroedinger Equation |
| IUPAC | International Union Of Pure And Applied Chemistry |
| DWRD | Drinking Water Research Division (EPA) |
| DSDP | Deep Sea Drilling Project |
| GMP | Guanosine 5'-monophosphate |
| LACE | Laser-assisted Chemical Etching |
| GGS | Global Geospace Science |
| IMF | Interplanetary Magnetic Field |
| CFE | Colony-forming Efficiency |