| Acronym | Meaning |
 | CASI | Canadian Aerospace Institute |
| MTI | Moving Target Indicator |
| DS | Lightning Detection Systems |
| NTISS | National Telecommunications And Information Systems Security |
| IUCR | International Union Of Crystallography |
| ANRHRD | Air Noise Radiation Health Research Division |
| HS | High Speed |
| MMD | Mass Median Diameter |
| UICP | Uniform Inventory Control Program |
| NARA | U.S. National Archives And Records Administration |
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