| Acronym | Meaning |
| OTO | Ordo Templi Orientis (Latin |
| NN | Norwegian Nynorsk Language (ISO 639-1 Code) |
| MACHO | MAssive Compact Halo Object |
| NDP | New Democratic Party (Canada) |
| SOX | Sarbanes-Oxley |
| CSEAL | Combat Systems Engineering And Analysis Laboratory (see-seal) |
| NASA | National Aeronautics And Space Administration |
| BEL | Belarusian Language (ISO 639-2 Code) |
| CESS | Centre For Earth Science Studies (India) |
| KR | Krypton |