Language

• Д (De), a letter in the Cyrillic alphabet.

• で or デ, the Japanese kana "de".

• De can mean of or from in French, Spanish, Catalan and Portuguese. When part of a surname from those countries, usually a nobiliary particle.

• De means the in Dutch.

Codes

• "DE" - the ISO 3166-1 alpha-2 country code for Germany

• .de - the ccTLD of Germany

• "de" - German language ISO 639-1 alpha-2 code

• "DE" - the United States postal abbreviation for Delaware

• "DE" - IATA airline designator for Condor Airlines

Computing

• Desktop Environment

Science

• Y-DNA Haplogroup DE

• Differential equation, in mathematics, an equation in which the derivatives of a function appear as variables

• Differential evolution is a method of mathematical optimization

• Diatomaceous earth, a mineral

• Dwarf elliptical galaxy or "dE", in astronomy

• Dynamics Explorer, a NASA satellite mission

• ΔE (deltaE) or dE, a mathematical measurement of the distance between two points in the Lab color space

• Dextrose Equivalent

Other

• De (Chinese), concept of "integrity" in Daoism and "virtue" in Confucianism

• Dé, Mali commune and town in Mali

• Defence Estates, an agency of the UK Ministry of Defence

• Department of Education (disambiguation), a common government department

• Destroyer escort, US Navy hull classification symbol

• Desert Eagle, a large-caliber Semi-automatic pistol manufactured by Magnum Research, inc.

• Dragon's Earth, a Super Famicom video game

• Desktop environment, in computing

• Digital Extremes, a video game publisher

• Douwe Egberts, a coffee brand

• Defensive end, a position in American football

• Shobha De, an Indian columnist and novelist

• De (surname) is a Bengali family name.

• Dream Evil, a Swedish power metal band.

• Doctor of Engineering, a degree equivalent to a Ph.D in engineering.