| Acronym | Meaning |
| AO | Angola (FIPS 10-4 Country Code; ISO 3166 Digram) -Approach Officer (submarine) - Area Of Operations |
| DJI | Djibouti (ISO 3166 Trigram) |
| MHW | Mean High Water (nautical Charts) |
| KNVB | Koninklijke Nederlandse Voetbal Bond (Dutch For Royal Netherlands Football Association) |
| MIDS | Multi-Function Information Distribution System |
| REEF | Reef Environmental Education Foundation |
| KAN | Kannada Language (ISO 639-2 Code) |
| XO | ???†‡?…??? ????‰???? (Xristianos Orthodoksos |
| WSDL | Web Services Description Language |
| T/O | Theatre Of Operations |