| Acronym | Meaning |
| TL | Tagalog Language (ISO 639-1 Code) |
| OSE | Own Separate Entrance |
| GTM | Guatemala (ISO 3166 Trigram) |
| ISO | In Search Of -International Organization For Standardization (from The Greek ?†?? |
| WSDL | Web Services Description Language |
| OCOKA | Observation |
| MMPR | Mighty Morphin Power Rangers |
| BBL | Be Back Later - Bird Banding Laboratory - British Basketball League |
| OSI | Office Of Strategic Influence - Ontario Swine Improvement - Open Source Initiative - Open Systems Interconnection |
| OHP | Observatoire De Haute-Provence |