| Acronym | Definition |
|---|
| D4D | Direct for Diesel |
| D4D | Dogs for Diabetics (Concord, CA) |
| D4D | Drive for Diversity (National Association for Stock Car Auto Racing) |
| D4D | Dynamics for Display (various locations) |
| D4D | Downtown for Democracy (New York) |
| D4D | Design for Demise (space debris) |
| D4D | Devices for Dignity (healthcare technology cooperative; UK) |
| D4D | Designing for Dissemination (US NCI; Bethesda, MD) |
| D4D | Dollars for Democrats (political group) |
