| Acronym | Meaning |
| DZD | (double Zeta)-diffuse (basis Set In Configuration-mixing MO Calcns. On Mols.) |
| ACTFEL | Alternating Current Thin-film Electroluminescent |
| OLR | Organic Loading Rate |
| SCP | Single-cell Protein |
| VEEH | Variable Electronegativity Extended Hueckel Method |
| TAPPI | Technical Association Of The Pulp And Paper Industry |
| STOVL | Short Take-Off And Vertical Landing |
| APR | Air-Purifying Respirator |
| STEP | Stratosphere Troposphere Exchange Project |
| MPY | Miles Per Year |