| Acronym | Meaning |
| NOHSC | National Occupational Health And Safety Commission (Australia) |
| ISPAC | International Society For Polycyclic Aromatic Compounds |
| SSME | Space Shuttle Main Engine |
| HCDW | Hydrogenic Continuum Distorted Wave (a Wave Function In Calcns. On Atomic And Molecular Collisions) |
| RZM | Root Zone Method (of Wastewater Treatment) |
| OIRM | Office Of Information Resources Management |
| TMBP | Tin Mill Black Plate |
| SIA | Sequential Injection Analysis |
| XRMA | X-ray Microanalysis |
| IP | Impact Parameter Approximation |