dial - dist
- dipole antenna
- dipole field
- dipole orbital distribution
- dipper
- dipping
- dipping and drying unit
- direct acting pump
- direct action impact fuse
- direct addition
- direct address
- direct air support
- direct command
- direct communications link
- direct control
- direct courses off airways
- direct current component
- direct current differential transformer
- direct current generator
- direct current locomotive
- direct cycle
- direct damage
- direct detection system
- direct drive
- direct drive clutch
- direct driven symmetry
- direct effect
- direct engineer support
- direct filament winding
- direct fire
- direct fire sight
- direct flight
- direct flight mode
- direct guidance
- direct heavy giro stabilization
- direct illumination
- direct injection
- direct kill
- direct laying position
- direct lift control
- direct line
