| Acronym | Definition |
|---|
| MDN➣Ministère de la Défense Nationale (Canada) |
| MDN➣Midland Daily News (Midland, MI, USA) |
| MDN➣Mainichi Daily News (newspaper) |
| MDN➣Meriden (Amtrak station code; Meriden, CT) |
| MDN➣Minieres du Nord (Canadian mining company) |
| MDN➣Major Device Number |
| MDN➣Mail Delivery Notification |
| MDN➣Multiple Domain Network |
| MDN➣Mobile Directory Number |
| MDN➣Multilingual Domain Name |
| MDN➣Mobile Data Network |
| MDN➣Message Disposition Notification |
| MDN➣Mobile Directory Number (Cellular) |
| MDN➣Message Disposition Notification (Cisco & RFC-2298) |
| MDN➣Missouri Digital News |
| MDN➣Ministerio de Defensa Nacional (Uruguay) |
| MDN➣Mobile Device Number |
| MDN➣Mercury Deposition Network (US EPA) |
| MDN➣Marcos de Niza (Tempe, AZ high school) |
| MDN➣Madison, Wisconsin (Airport Code) |
| MDN➣Mdina (postal locality, Malta) |
| MDN➣Managed Data Network (various companies) |
| MDN➣Microsoft Developer Network (usually seen as MSDN) |
| MDN➣Mozilla Developer Network (web development tools website) |
| MDN➣Mobilisation pour le Développement National (French: Mobilization for National Development, Haiti) |
| MDN➣Midwest Democracy Network |
| MDN➣Macular Degeneration Network (eyes) |
| MDN➣Medical Decisions Network (Charlottesville, Virginia) |
| MDN➣Malware Delivery Network |
| MDN➣Ministerio de la Defensa Nacional (Guatemala) |
| MDN➣Music Discovery Network |
| MDN➣Medisinsk Diagnostisk Nettverk (network of Scandinavian health personnel) |
| MDN➣Meta Data Navigator (graphical user interface; Atmospheric Radiation Measurement; US Department of Energy) |
| MDN➣Mystro Digital Navigator (Time Warner Cable DHCT client application) |
| MDN➣Muslim Death Notices (website) |
| MDN➣Multiple Directory Numbers |
| MDN➣Media Distribution Network (Motorola) |
| MDN➣MAC Distributor Network |
| MDN➣Mutual Defense Network (CashWars game) |
| MDN➣Manipal Dot Net (India) |
| MDN➣MasterDarkNinja (gaming) |
| MDN➣Macro Definition Notation (ASN.1) |
| MDN➣Manufacturer's Drawing Number |
| MDN➣More Developed Nations |
| MDN➣Main Distribution Node (expandable communications facility) |
| MDN➣Musicals Dot Net (website) |