| Acronym | Definition |
|---|
| OII➣Office of Insurance Information |
| OII➣Oxford Internet Institute (UK) |
| OII➣Office of Innovation and Improvement |
| OII➣Organization Intersex International |
| OII➣Open Information Interchange |
| OII➣Online Internet Institute |
| OII➣Out Island Interiors (interior decorating) |
| OII➣Orthopaedic International, Inc. (Philippines) |
| OII➣Online Innovation Institute |
| OII➣Operations-Intelligence Interface |
| OII➣Office of Industrial Innovation (US NSF) |
| OII➣Organización Internacional Intersexuales (Spanish: International Organization of Intersexuals) |
| OII➣Occupational Injury or Illness |