| Abbreviation | Definition |
|---|---|
| DRFU | Devon Rugby Football Union |
| DRU | Dansk Rugby Union |
| DRUM | Dodge Revolutionary Union Movement |
| DSEU | Diplomatic System of the European Union |
| DSU | Dawson Student Union |
| DSU | Democratic Students Union |
| DSU | Departmental Student Union |
| DSU | DiGiorgio Student Union |
| DSU | Disjoint Set Union |
| DSU | Downing Student Union |
| DUCU | Dundee University and College Union |
| DUI | Democratic Union for Integration |
| DUMU | Duke University Math Union |
| DUNCHE | Lunch with dinner : dunche |
| DUSS | Dissolved Union of Sovereign States |
| DUSU | Delhi University Students' Union |
| DUU | Drexel University Union |
| DUU | Duke University Union |
| DUV | DAUGHTER of UNION VETERANS |
| DUV | Daughter Union Veterans |