| Acronym | Meaning |
| CALL | (U.S.) Center For Army Lessons Learned |
| PSI | Portable Source Initiative |
| IVO | In Vicinity Of |
| ISLN | International Standard Lawyer Number |
| KX | Cayman Airways (IATA Airline Designator) |
| WO | Warrant Officer |
| IMRL | Individual Material Readiness List |
| RFA | Restrictive Fire Area (military) - Royal Field Artillery |
| FSC | Federal Supply Classification -Forest Stewardship Council (ecological Pressure Group) |
| ASR | Anti Slip Regulation |