| Acronym | Meaning |
| RON | Romanian New Leu (ISO 4217 Currency Code) |
| SGP | Singapore (ISO 3166 Trigram) |
| FAA | U.S. Federal Aviation Administration - Financial Aid Administrator - Fleet Air Arm - Functional Area Analysis |
| PRI | Puerto Rico (ISO 3166 Trigram) |
| RTI | Run-Time Infrastructure (Simulation) |
| NO | Nitric Oxide -Normally Open -Norway (ISO 3166 And FIPS 10-4 Country Code Digram) |
| ETB | Ethiopian Birr (ISO 4217 Currency Code) |
| CVI | Combat Vehicle Identification |
| CONCACAF | Confederation Of North |
| ETI | Extra-Terrestrial Intelligence |