| Acronym | Meaning |
| LEP | Local Electron Pair (model For Intra- & Intermol. Interactions) |
| NZRPA | Normalized Zero-range Potential Approxn. |
| NWEA | National Wood Energy Association |
| NASD | National Ag Safety Database |
| GGG | Gallium Gadolinium Garnet |
| STE | Septic Tank Effluent |
| SIMM | Single Inline Memory Module |
| SO SCF | Spin-optimized Self-consistent Field |
| SGA | Symmetric Group Approach |
| GRAS | Generally Recognized As Safe |