ATDN
| Acronym | Definition |
|---|---|
| ATDN | Any Time Day or Night |
| ATDN | AOL Transit Data Network |
| ATDN | Adult Training and Development Network |
| ATDN | AIDS Treatment Data Network (est. 1988; New York, NY) |
| ATDN | Advanced Technology Demonstration Network (Darpa) |
| ATDN | Adult Training and Development Network (Capitol Region Education Council; Connecticut) |
| ATDN | Amazon Tree Diversity Network (network for data and information sharing on tree diversity in the Amazon) |