| Acronym | Meaning |
 | MY | Malaysia (FIPS 10-4 Country Code; ISO 3166 Digram) |
| ZS | Zettasecond |
| ATO | Air Tasking Order - Australian Taxation Office |
| ACT | R -ACT-Rational (cognitive Model) |
| DAU | (U.S.) Defense Acquisition University |
| MISSI | Multilevel Information System Security Initiative |
| YID | Yiddish Language (ISO 639-2 Code) |
| II | Sichuan Yi Language (ISO 639-1 Code) |
| LI | Lithium |
| NM | Nanometre |
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