| Acronym | Definition |
|---|
| DMSS | Defense Medical Surveillance System |
| DMSS | Distributed Mass Storage System |
| DMSS | Djibouti Maritime Security Services (Djibouti) |
| DMSS | Decision Making Support System (computing) |
| DMSS | Dalhousie Medical Student Society (Dalhousie University; Canada) |
| DMSS | Deployable Mission Support System (cyber security) |
| DMSS | Dual Mode Subscriber Software |
| DMSS | Digital Mass Storage System |
| DMSS | Distribution, Marketing, Sales, and Service |
| DMSS | Depot Maintenance Standard Systems |
| DMSS | Distributed Multimedia Software System |
| DMSS | Director, Maritime Ship Support (Canadian Navy) |
| DMSS | Dar-Ul-Mominien Schooling System (secondary education; Pakistan) |