PSDN
| 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) |