| Acronym | Meaning |
| GIXA | Glancing-incidence X-ray Analysis |
| BO | Brueckner Orbital |
| NARS | National Asbestos Registry System |
| ALEPH | Apparatus For LEP PHysics |
| CNDO/2-U | Universal CNDO/2 (extended To Full Periodic Table) |
| NISO | National Information Standards Organization |
| NDWAC | National Drinking Water Advisory Council |
| RIR | Reference-intensity Ratio |
| SNP | Sodium Nitroprusside |
| ELF | Extremely Low Frequency |