| Acronym | Meaning |
| XXX | Hardcore Pornography (film Rating) - Thirty (in Roman Numerals) |
| SEN | Senegal (ISO 3166 Trigram) -Small Extension Node |
| XOF | BCAO (Banque Centrale Des ?tats De L'Afrique De L'Ouest) West African CFA (Communaut? Financi?re D'Afrique) Franc (ISO 4217 Currency Code) |
| PAPI | Precision Approach Path Indicator (aviation) |
| WRS | Worldwide Reference System |
| VLBA | Very Long Baseline Array |
| PP | Papua New Guinea (FIPS 10-4 Country Code) -Passage Point - Per Procurationem (Latin |
| CORBA | Common Object Request Broker Architecture |
| CHE | Chechen Language (ISO 639-2 Code) |
| MOU | Memorandum Of Understanding |