| Acronym | Definition |
|---|
| PSDN➣Packet Switched Data Network |
| PSDN➣Public Switched Data Network |
| PSDN➣Panasonic Solution Developer Network |
| PSDN➣Philippine Sustainable Development Network |
| PSDN➣Progress Software Developers Network (Progress Software Corporation; support service) |
| PSDN➣Pacific Sexual Diversity Network (HIV/AIDS education) |
| PSDN➣Partido Social Democrata Nacional (National Social Democratic Party - Brazil) |