DDE

Template:Sister project DDE may refer to:

• D.D.E. (band), a Norwegian rock band
• Delay differential equation, a type of differential equation
• Deep-dose equivalent, a measure of radiation absorbed by the body
• Dichlorodiphenyldichloroethylene, a chemical that results from the breakdown of DDT
• Doctrine of double effect, a set of ethical criteria to evaluate the permissibility of acting when one's otherwise legitimate act may also cause an effect one would normally be obliged to avoid
• Dwight D. Eisenhower, the 34th president of the United States
• Dynamic Data Exchange, a Microsoft Windows and OS/2 inter-application data communication protocol
• Escort destroyer, a US Navy classification used between 1945 and 1962
• D.De., an abbreviation used for the United States District Court for the District of Delaware
• Deepin Desktop Environment, a Desktop Environment used by several Linux Distributions