| Acronym | Meaning |
| OOP | Object-Oriented Programming - Out Of Print |
| JRRF | Joint Rapid Reaction Forces |
| NIPR | National Institute Of Polar Research (Japan) |
| INC | Iglesia Ni Cristo (Filipino |
| ICS | In-Country Support - Intelligence And Communications Systems - Interim Contractor Support |
| WC | Water Closet - Winston Churchill - World Cup (sports) |
| PCL | Passive Coherent Location |
| ONS | Operational Needs Statement |
| C4 OR C? | Command |
| SPDT | Single-Pole Double-Throw |