| Acronym | Meaning |
| CBD | Chronic Beryllium Disease |
| NDDO | Neglect Of Diatomic Differential Overlap |
| CHCS | Chemical Hazards Communication Society |
| ICB | Ionized Cluster Beam |
| CMC | Ceramic Matrix Composite |
| OHFS | Optimized Hartree-Fock-Slater |
| HEMA | Hydroxyethyl Methacrylate |
| SDG | Signed Directed Graph (model) |
| CEM | Continuous Emissions Monitoring |
| OSCCM | Open-shell Coupled-cluster Method (in Electronic Property Calcn.) |