| Acronym | Meaning |
| USTAR | UCAR Scientist's Technical Areas Of Research |
| NAO | North American Oscillation |
| APET | Accident Progression Event Tree |
| M-ISWS | Illinois State Water Survey |
| NEEDS | N/A |
| IF | Intermediate Frequency |
| ARAR | Applicable Or Relevant And Appropriate |
| NEHRP | National Earthquake Hazard Reduction Program |
| ELI | Environmental Law Institute |
| ESIS | Earth Science Information System |