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