| Acronym | Meaning |
| OCAP | Open-channel Air Preheater |
| MS | Multiple Scattering |
| PFLT | Paint Filter Liquids Test |
| MLT | Magnetic Local Time |
| OGC | Office Of General Counsel |
| MINLP | Mixed-integer Nonlinear Programming |
| OIG | Office Of Inspector General |
| HF MO LCAO | Hartree-Fock MO LCAO |
| VLA | Very Large Array |
| MCPA | Molecular Coherent-potential Approximation |