| Acronym | Meaning |
| NIOSH | National Institute For Occupational Safety And Health |
| CAST | Council For Agricultural Science And Technology |
| TANGO | Testing For Adjacent Nuclei With A Gyration Operator |
| NIMS | Negative Ion Mass Spectrometry |
| FMO | Floating Molecular Orbital |
| HKS | Hohenberg-Kohn-Sham (quantum Theory) |
| APCS | Argonne Premium Coal Sample |
| MCK | Muscle Creatine Kinase |
| HAM/N | Hydrogenic Atoms In Molecules |
| OBK3 | Third-order Oppenheimer-Brinkman-Kramers |