| Acronym | Meaning |
 | EBB | Equivalent Blockbody |
| SIM | Solar Interplanetary Model |
| AC | Actual Commitment |
| ACTS | Advanced Communications Technology Satellite |
| FTFC | Fourier Transform Flow Cytometer |
| ICA | International Central Archive |
| MACCM3 | Middle Atmosphere Community Climate Model |
| NCGIA | National Center For Geographic Information And Analysis |
| IRS | Indian Remote-sensing Satellite |
| ERS | Earth Resources Satellite |
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