| Acronym | Meaning |
 | VFR | Visual Flight Rules |
| OSS | Office Of Strategic Services (1942?1945 |
| YV | Yottavolt |
| NIO | Nicaraguayan Cordoba Oro (ISO 4217 Currency Code) |
| POD | Plain Old Documentation |
| MOB | Man Over Board - Marching Owl Band - Movable Object Block |
| VOR | VHF Omnidirectional Ranging |
| IANA | Internet Assigned Numbers Authority |
| RT | Real Time - Radio Telephone -Return To Duty |
| SL | Sierra Leone (ISO 3166 And FIPS 10-4 Country Code Digram) -Start Line |
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