DACL: Discretionary Access Control List
DAO: Data Access Objects
DaRT: Diagnostics and Recovery Toolset
DCE: Desktop Compositing Engine
DCI: Display Control Interface
DCOM: Distributed Component Object Model
DDK: Driver Development Kit
DEM: Desktop Error Monitoring
DEP: Data Execution Prevention
DGA: Direct Graphics Access
DHCP: Dynamic Host Configuration Protocol
DIB: Device Independent Bitmap
DIMS: Digital Identity Management Service
DSI: Dynamic System Initiative
DSM: Data Source Manager
DTC: Distributed Transaction Coordinator
DTM: Driver Test Manager
DWM: Desktop Window Manager