DCO
DCO is an abbreviation for:
- Device configuration overlay, see ATA / ATAPI # ATA / ATAPI-6 (since 2000, ANSI NCITS 361-2002)
- Digitally Controlled Oscillator
- Doping Control Officer , in accordance with Art. 3.2.5 NADA standard for doping controls, a person appointed by the anti-doping organization who has been given responsibility for taking samples on site.