Computing
- Delta-sigma modulation, a kind of analog-to-digital or digital-to-analog conversion
- Distributed shared memory, software and hardware implementations in which each cluster node accesses a large shared memory
- Domain-specific modeling, a software engineering methodology for designing and developing IT systems
- Dynamic spectrum management, a technique to increase bandwidth over DSL
- Direct stiffness method, a method of structural analysis
- Digital standard MUMPS, a version of the MUMPS programming language
- Digital surface model, another term for digital elevation model, used to digitally map topography
- Dedicated security mode, one of several information systems security modes used in mandatory access control systems
- Device specific module, used in disk arrays and storage area networks
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