- derivative action
- derived
- derived series
- derived type
- descend
- descender
- descending
- descending sort
- description form
- descriptive data
- deselect
- desiccator
- design chart
- design cycle
- design mode
- design system
- Design View
- designation
- desired
- desk accessory
- desktop application
- despool
- destination
- destination document
- destination node
- destination station
- destructive addition
- detached
- detail flowchart
- detection threshold
- determination
- determining factor
- deterministic algorithm
- deterministic language
- determistic process
- developable class
- developed image
- development group
- development software
- dew-point
- diacritical mark
- diagnose interface
- diagnostic
- diagnostic chip
- diagnostic function
- diagnostic output
- diagonal algebra
- diagonal injection
- diagonal morphism
- diagonal surface
- diagonalize
- dial pulsing
- dialable format
- dialectics
- dialogue language
- dipulse
- direct access
- direct attach
- direct attachment
- direct control
- direct correlation
- direct correspondence
- direct coupling
- direct current
- direct demonstration
- direct execution
- direct factor
- direct file
- direct input
- direct join
- direct limits
- direct mail
- direct marketing
- direct measurement
- direct motion
- direct operation
- direct percentage
- direct power
- direct printer
- direct problem
- direct projection
- direct projectivity
- direct proportion
- direct pulse
- direct ratio
- direct reading
- direct recording
- direct scanning
- direct selling
- direct spectrum
- direct submission
- direct sum
- direct system
- direct tax
- direct union
- direct variation
- direct-coupled
- directed graph
- directed group
- directed network