| Acronym | Meaning |
| NCASI | National Council For Air And Stream Improvement |
| DTP | Developmental Therapeutics Program |
| DZD | (double Zeta)-diffuse (basis Set In Configuration-mixing MO Calcns. On Mols.) |
| VCS | Voluntary Cleanup Section |
| PMA | Pharmaceutical Manufacturers Association |
| IPWO | Interface Plane Wave Orbitals |
| STERAO | Stratosphere-Troposphere Experiments: Radiation |
| SANS | Small-angle Neutron Scattering |
| NSCSS | Noise-suppressing Capillary Separation System |
| ACWA | American Clean Water Association |