| Acronym | Meaning |
 | TSEC | Transmission Security Encryption Code |
| ZS | Zettasiemens |
| DASL | Datapoint's Advanced System Language |
| PAROS | Prevention Of An Arms Race In Outer Space (treaty) |
| ACINT | Acoustic Intelligence |
| SK | Saskatchewan (postal Symbol) - Slovakia (ISO 3166 Digram) |
| CAVOK | Ceiling And Visibility OK (Kav-okay) |
| KN | Kannada Language (ISO 639-1 Code) |
| FS | Fire Support (military) -French Southern And Antarctic Territories (FIPS 10-4 Territory Code) |
| TA | Tantalum |
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