| SDN | Danish Neuropsychological Society 
| Others |
| SDN | Sandane, Norway
| Others |
| SDN | SAP Developer Network
| Others |
| SDN | Savage Daily News
| Others |
| SDN | SCAMPI Deployable Node
| Others |
| SDN | Screening Deficiency Notice
| Others |
| SDN | Sedan
| Others |
| SDN | Self Defending Network
| Others |
| SDN | Selskabet Danske Neuropsykologer
| Others |
| SDN | Send Data Now
| Others |
| SDN | Service Delivery Network
| Others |
| SDN | Service Dialing Numbers
| Others |
| SDN | Service Drawing Number
| Others |
| SDN | Shareware Distribution Network
| Others |
| SDN | Shopaholics Daily Nightmare
| Others |
| SDN | Silver Dollar Nationals
| Others |
| SDN | Single Digit Number
| Others |
| SDN | Sitecore Developer Network
| Others |
| SDN | Social Development Network
| Others |
| SDN | Social Documentary Network
| Others |
| SDN | Software Defined Network
| Others |
| SDN | Software Defined Networking
| Others |
| SDN | Software Defined Networks
| Others |
| SDN | Software Development Network
| Others |
| SDN | Software Development Note
| Others |
| SDN | Software distribution network
| Others |
| SDN | Software Distribution Network compressed file archive
| Others |
| SDN | Solution Dyed Nylon
| Others |
| SDN | Specially Designated National
| Others |
| SDN | Specially Designated Nationals
| Others |
| SDN | Steep Deep And Narrow
| Others |
| SDN | Still Does Nothing
| Others |
| SDN | Still Done Nothing
| Others |
| SDN | Student Doctor Network
| Others |
| SDN | Subjects Distinguished Name
| Others |
| SDN | SuiteCloud Developer Network
| Others |
| SDN | Sun Developer Network
| Others |
| SDN | Super Duper Neurotic
| Others |
| SDN | Switched Digital Network
| Others |
| SDN | System Development Network
| Others |
| SDN | System Development Notification
| Others |
| SDN | Systeme De Navigation
| Others |