| Acronym | Meaning |
| DIR | Diffusion Induced Recrystn. |
| PM10 | Particulate Matter |
| ATP | Adenosine Triphosphate (reg: 56-65-5) |
| X-SAR | X-Band Synthetic Aperture Radar |
| MCA | Middle Cerebral Artery |
| NECAC | National Environmental Compliance Assistance Center |
| BAW | Bulk Acoustic Wave |
| FSOT | Fused Silica Open Tubular |
| AMS | AIRS Area/Mobile Source Subsystem (subsystem Of AIRS) |
| SANDS | Stratospheric Aitken Nuclei Detection System |