OBSN
| Acronym | Definition |
|---|---|
| OBSN | Observation |
| OBSN | Occaneechi Band of the Saponi Nation (Mebane, NC) |
| OBSN | Online Banking Security Number |
| OBSN | Optical Burst-Switched Network |
| OBSN | Ohio Bobcat Sports Network (Ohio University) |
| OBSN | Ocean Bottom Seismic Network |