| Acronym | Definition |
|---|
| IDSA | Infectious Diseases Society of America |
| IDSA | Industrial Designers Society of America |
| IDSA | Interactive Digital Software Association |
| IDSA | Institute for Democracy in South Africa |
| IDSA | International Dark Sky Association |
| IDSA | Institute for Defense Studies and Analyses (India) |
| IDSA | Indian Direct Selling Association |
| IDSA | Irish Deaf Sports Association |
| IDSA | International Digital Software Association |
| IDSA | International Design Society of America |
| IDSA | Irish Diaspora in Scotland Association |
| IDSA | Inter-Departmental Support Agreement |