This is a disambiguation page.
Computing
- MDA is an abbreviation of OMG's Model Driven Architecture
- Monochrome Display Adapter, a computer display standard.
- Mail Delivery Agent.
- The ISO 3166-1 three-letter country code for Moldova.
- MDA is a type of drug. Closely related to MDMA (Ecstasy).
- MDA is an abbreviation for the Missile Defense Agency, an agency of the United States Department of Defense