| Acronym | Meaning |
 | SPPS | System Plot Package Simulator |
| GAP | GATE Advisory Panel |
| TIP | TIROS Information Processor |
| JFSP | Joint Forecast System Project |
| ORD | Office Of Research And Development |
| ACL | Alternative Concentration Level/limit |
| FRS | First Repository States |
| BER | Biological And Environmental Research |
| SEL | Space Environment Laboratory |
| SPEC | Scientific Programs Evaluation Committee |
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