| Abbreviation | Definition |
|---|---|
| DMB1 | Descent Mission Builder I computer game |
| DMB2 | Descent Mission Builder II computer game |
| DMBA | Durham Mountain Biking Association (Ontario) |
| DMBB | Dublin Men's Basketball Board |
| DMBC | Durango Mountain Bike Camp |
| DMBC | Durban Mountain Bike Club |
| DMBH | Dragons Must Be Here computer game |
| DMBO | Diamond Mind Baseball Organization |
| DMBQ | DelMarVa Bike Week |
| DMBR | Downhill Mountain Bike Racing |
| DMC | Drugs Make Champions |
| DMG | Dungeon Masters Guide |
| DMGC | Duisburg Military Golf Club |
| DMHA | Dallas Metro Hockey Association |
| DMHA | Dundas Minor Hockey Association |
| DMHN | Double Minor Hockey Network |
| DMI | Dead Man Incorporated |
| DML | Da Minor Leagues |
| DMSL | Darlington Men's Soccer League |
| DMTC | Del Mar Thoroughbred Club |