DCO

DCO may refer to: Diploma in Community Ophthalmology

Astronomy

• Dark compact object, a dark compact star

Technology

• Device configuration overlay, of a computer hard disk drive
• Digitally controlled oscillator, in electronics
• Siemens DCO, a telephone switch
• Drift City Online, a game
• Domain controller, on Microsoft Servers
• Developer Certificate of Origin, used in open source software projects to verify individual contributions

Other

• Deep Carbon Observatory
• Development Consent Order, the means of obtaining permission for nationally significant projects in England and Wales
• Digital Cooperation Organization, an international organization
• Dimension Century Orguss, anime series
• Direct commission officer, a military rank
• Disney Channel Original (disambiguation)
• District coordination officer, a civil service position in Pakistan
• The British Columbia Regiment (Duke of Connaught's Own), a regiment of the Canadian Forces
• Duke of Cambridge's Own, aka Middlesex Regiment
• Dynamic Creative Optimization, a term used in programmatic marketing
• D.Co., an abbreviation used for the United States District Court for the District of Colorado
• Docket Control Order, a legal document used to confirm court deadlines.
• Document Control Officer controls access to documents that are restricted to certain people

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