| Acronym | Meaning |
 | SIS | UK Secret Intelligence Service (also Known As MI6) |
| SCTP | Stream Control Transmission Protocol |
| SP | Special - Spring Tide (nautical Charts) |
| DD | Many |
| IV | C?te D'Ivoire (FIPS 10-4 Country Code; From Ivory Coast) - Four (in Roman Numerals) -IntraVenous (as In Intravenous Drip Or Intravenous Therapy) |
| P | Peta - Phosphorus |
| NOAF | Norwegian Air Force |
| UGA | Uganda (ISO 3166 Trigram) |
| SIN | Social Insurance Number (Canada) |
| HVU | High Value Unit (military) |
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