| Acronym | Meaning |
| PSI | Portable Source Initiative |
| CAEN | Close Action Engagement (constructive Simulation) |
| CHIP | California Highway Patrol |
| SASO | Stability And Support Operations |
| JMS | Java Message Service |
| GMB | The Gambia (ISO 3166 Trigram) -General |
| LG | Latvia (FIPS 10-4 Country Code) |
| E? OR E3 | Many |
| MQ | Martinique (ISO 3166 Digram) - Midway Islands (FIPS 10-4 Territory Code) |
| O | Oberst - Observer - Obstacle - Octal - Officer - Official - Oh - Operational - Operator - Oprah (magazine) - Outstanding -Oxygen |