disk - down
- Doppler
- Doppler broadened laser
- Doppler displacement
- Doppler displacement meter
- Doppler optical flowmeter
- Doppler selection method
- Doppler system
- Doppler ultrasonic flowmeter
- Doriot-joint hose
- dormant
- DOS
- DOS board
- DOS CAM system
- DOS platform
- DOS program
- DOS-based PC
- DOS-based software
- DOS/VS
- dosage
- dose
