| Acronym | Meaning |
| MIS | Metal-insulator-semiconductor (solar Cells) |
| NLMO | Nonorthogonal Localized Molecular Orbital |
| SOPPA | Second-order Polarization Propagator Approxn. |
| IRBP | Interstitial Retinol-binding Protein |
| OCS | Outer Continental Shelf |
| TGSCC | Transgranular Stress-corrosion Cracking |
| BAO | Best Atomic Orbital Basis |
| VSS | Volatile Suspended Solids |
| IP | Inhalable Particle |
| EMD | Electrochemically (manufd.) Manganese Dioxide |