ISDN
| Acronym | Definition |
|---|---|
| ISDN | Integrated Services Digital Network |
| ISDN | Integriertes Sprach- und Datennetz (German) |
| ISDN | Ithaca Swing Dance Network (online database; Ithaca, NY) |
| ISDN | International Subscriber Directory Number |
| ISDN | Institute for the Study of Developing Nations |
| ISDN | Isosorbitdinitrate |