| Acronym | Meaning |
 | COIN | Counter-Insurgency (military) |
| IR | Iridium |
| ARP | Address Resolution Protocol - Applied Research Programme |
| IP | Clipperton Island (FIPS 10-4 Territory Code) -Initial Point - Intellectual Property - Internet Protocol |
| PS | Picosiemens |
| IFAH | International Federation For Animal Health |
| AANEAS | Anglo-Australian Near-Earth Asteroid Survey |
| ARA | Arabic Language (ISO 639-2 Code) |
| CO | Corsican Language (ISO 639-1 Code) |
| XVI | Sixteen (in Roman Numerals) |
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