| Acronym | Meaning |
| MRSD-CI | Multireference Single And Double Excitation CI |
| ASFF | Aerated Stationary Or Submerged Fixed-film (wastewater Treatment) |
| SARS | Severe Acute Respiratory Syndrome |
| FBR | Fast Breeder Reactor |
| WRDC | Wright Research And Development Center |
| CLRC | Central Laboratory Of The Research Councils |
| NSTA | National Science Teachers Association |
| IT | Integral Transform |
| ADPIC | Atmospheric Dispersion Particle-in-Cell |
| LSF | Laser-saturated Fluorescence |