OEIS
| 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) |