| Acronym | Meaning |
 | USACE | United State Army Corps Of Engineers |
| ATST | Advanced Technology Solar Telescope |
| AL | Authorized Leave With Pay |
| IBM RT | The IBM RISC Technology Computer System |
| APC | Argon Purge Cart |
| FRC | Federal Records Center |
| LME | Layer Management Entity |
| PD | Positive Definite |
| GN | Ground Network |
| EORC | Earth Observation Research Center |
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