| Acronym | Meaning |
| GAXRD | Glancing Angle X-ray Diffraction |
| SDCI | Single And Double Excitation Configuration Interaction Model |
| HFFR | Halogen-free Flame Retardant [thermoplastics] |
| CNDO/IP | Complete Neglect Of Differential Overlap/ionization Potential |
| RAPW | Relativistic Augmented Plane Wave |
| WSTCM | Watson-sphere Terminated Cluster Model (in Electronic-structure Calcns. On Crystal Defects) |
| NOM | Natural Organic Matter |
| CDE | Collective Dose Equivalent |
| DIMZO | Diatomics-in-molecules Zero-overlap |
| PC | Personal Computer |