| Acronym | Meaning |
| AAO | Acetaldehyde Oxime |
| ATCM | Air Toxics Control Measure |
| SOEF | Specific Odor Emission Factor (odor Source Evaluation) |
| NCE | New Chemical Entity |
| SCM | Subsurface Chlorophyll Maximum |
| ACPTQ | Approx. Coupled Pair (theory Cor. For Connected) Triple And Quadruple Excitations |
| MVMA | Motor Vehicle Manufactures Association |
| AGS | Alternating Gradient Synchroton |
| EBOM | Effective Bond-orbital Method |
| ATM | Analytic Tetrahedron Method (for Brillouin-zone Integrals And Electron Spin Densities) |