PIOS
| Acronym | Definition |
|---|---|
| PIOS | Personen, Institutionen, Objekte, Sachen |
| PIOS | Pew Institute for Ocean Science |
| PIOS | Public Information and Outreach Section (Bosnia and Herzegovina) |
| PIOS | Pinhole Illumination-Optical Sectioning (cancer research) |
| PIOS | Personal Injuries Online Service (legal software) |
| PIOS | Policy Implementation Overlay Services |