| Acronym | Meaning |
 | IUCR | International Union Of Crystallography |
| MRS | Mesoscale Research Section |
| ACE-1 | Aerosol Characterization Experiment |
| ACBM | Asbestos-containing Building Material |
| BWC | Biological Weapons Convention |
| SEAC | (National Bureau Of) Standards Eastern Automatic Computer |
| SMI | Solar Magnetism Initiative |
| DIB | Disabilities Issues Board |
| UMF | User Master File |
| P/L-EX | Payload Executive |
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