| Acronym | Meaning |
 | MSR | Main Supply Route - Module Service Record -Montserrat (ISO 3166 Trigram) -Motor Schlepp Regulung |
| AS | American Samoa (postal Symbol; ISO 3166 Digram) - Australia (FIPS 10-4 Country Code) |
| COSER | COoperative SERvice |
| TDM | Time-Division Multiplexing |
| BIOS | Basic Input/Output System - British Institute Of Organ Studies |
| ACSC | Army Command And Staff College (various Nations) |
| DSAA | (U.S.) Defense Security Assistance Agency |
| CK | Cocos (Keeling) Islands (FIPS 10-4 Country Code) - Cook Islands (ISO 3166 Digram) |
| BCFG | Patchy Fog (METAR Code) |
| AVUM | Aviation Unit Maintenanc |
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