| OSN | O Scale News 
| Others |
| OSN | Observatory of Sierra Nevada
| Others |
| OSN | Ocean Science News
| Others |
| OSN | Ocular Surgery News
| Others |
| OSN | Office System Node
| Others |
| OSN | Oklahoma Sports Network
| Others |
| OSN | Old School Nintendo
| Others |
| OSN | Olfactory Sensory Neuron
| Others |
| OSN | Olimpiade Sains Nasional
| Others |
| OSN | On Shelves Now
| Others |
| OSN | One Source Networks
| Others |
| OSN | One Starry Night
| Others |
| OSN | One Stop Notification
| Others |
| OSN | Online Scouting Network
| Others |
| OSN | Online Social Network
| Others |
| OSN | Online Submission Number
| Others |
| OSN | Open Science Network
| Others |
| OSN | Open Solution Network
| Others |
| OSN | Open Source Network
| Others |
| OSN | Open Source North
| Others |
| OSN | Open Space Network
| Others |
| OSN | Open Storage Networking
| Others |
| OSN | Open Synthesis Network
| Others |
| OSN | Open Systems Network
| Others |
| OSN | Operand Segment Number
| Others |
| OSN | Operator Security Number
| Others |
| OSN | Optical Service Network
| Others |
| OSN | Optical Service Node
| Others |
| OSN | Optical Switching and Networking
| Others |
| OSN | Optical Switching Network
| Others |
| OSN | Optical Synchronous Network
| Others |
| OSN | Oracle Social Network
| Others |
| OSN | Oracle Supplier Network
| Others |
| OSN | Orbit Showtime Network
| Others |
| OSN | Origami Societeit Nederland
| Others |
| OSN | Original Script Name
| Others |
| OSN | Original Senshi Network
| Others |
| OSN | Orion Syndicate Network
| Others |
| OSN | Osa Network
| Others |
| OSN | Oshkosh Supplier Network
| Others |
| OSN | Output Sequence Number
| Others |