| Acronym | Meaning |
 | AIC | Acceptable Intake For Chronic Exposure |
| ANL | Argonne National Laboratory |
| UNESCO | United Nations Educational |
| FTS | Federal Telecommunications System |
| SUSIM | Solar Ultraviolet Spectral Irradiance Monitor |
| HCN | Historical Climatology Network |
| NETS | Network Engineering And Telecommunications Section |
| PCMDI | Program For Climate Model Diagnosis And Intercomparison |
| BGE | Block Gaussian Elimination |
| EG&G | Inc. |
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