| Acronym | Definition |
|---|
| OEIS➣On-line Encyclopedia of Integer Sequences |
| OEIS➣Overseas Environmental Impact Statement |
| OEIS➣Omphalocele-Exstrophy-Imperforate Anus-Spinal Defects (birth defect complex) |
| OEIS➣Offshore Engineering Information Service (Heriot Watt University) |