CDO may refer to:

Aeronautics

* pronunciation of the zero-lift drag coefficient „

C_

”

Chemistry

* Cysteine dioxygenase, an enzyme * CDO, trade name of chlordiazepoxide * CdO, cadmium oxide

Computing

* Climate Data Operators, a command line suite for manipulating and analyzing climate data * Collaboration Data Objects, a Microsoft application programming interface for data access * Connected Data Objects, a free implementation of a distributed shared model

Places

* Cagayan de Oro, a city on Mindanao Island, Philippines * Canyon del Oro High School, a public school in Oro Valley, Arizona, USA * Cañada del Oro, a primary watershed channel in the valley of Tucson, Arizona, USA

People

Job titles

* Chief data officer, an information systems title * Chief Dental Officer (Canada), a Canadian official who advises on oral health * Chief Dental Officer (United Kingdom), a professional advisor for dentistry in each of the 4 UK governments * Chief design officer, a corporate design position * Chief development officer (aka Chief business development officer), a business position * Chief Development Officer (India), a civil servant in the Indian states of Uttar Pradesh and Uttarakhand * Chief digital officer * Chief diversity officer * Command duty officer

Other uses

* CDO Foodsphere, a Philippine meat processing company * Central dense overcast, in a tropical storm * Collateralized debt obligation, a structured finance product * Community dial office, a telephone switching system for small communities * Continuous duty overnight, a regional airline crew scheduling term * ISO-639 code for the Eastern Min branch of Chinese * Conservative Democratic Organisation, an organization associated with the UK Conservative Party