| Acronym | Meaning |
| ISM | Intersecting Spheres Model (for Electronic-structure Calcns.) |
| EIR | Environmental Impact Report |
| SMP | Submitochondrial Particle |
| NOAO | National Optical Astronomy Observatories |
| PFPD | Pulsed-flame Photometer Detector |
| AFLP | Amplified Fragment Length Polymorphism |
| MAOP | Maximum Allowable Operating Pressure |
| CEEL | Community Emergency Exposure Level |
| FVEH | Fragment Valence Effective Hamiltonian (in Electronic-structure Calcns. On Mol. Fragments) |
| ICM | Inner Cell Mass |