DE

DE, de, or dE may refer to:

Human names

De (Cyrillic) (Д, д), a letter in the Cyrillic script
German language (ISO 639-1 alpha-2 code)
De (kana) (で, デ), a Japanese hiragana/katakana
de (interjection)
de-, an English prefix conveying negation
Downward entailing, a linguistic expression that denotes a monotone decreasing function

Defence Estates, an agency of the UK Ministry of Defence
Desert Eagle, a large-caliber semi-automatic pistol manufactured by Magnum Research
Destroyer escort (US Navy hull classification symbol)

Desktop environment, a graphical user interface commonly based on a desktop metaphor
Dextrose equivalent, the relative sweetness of sugars
Diatomaceous earth, a naturally occurring, soft, siliceous sedimentary rock mineral
Differential equation, an equation which derivatives of a function appear as variables
Differential evolution, a method of mathematical optimization
Design engineer, engineer whose specialty is in design
Doctor of Engineering, a degree equivalent to a Ph.D. in engineering
Dwarf elliptical galaxy (dE), in astronomy
Dynamics Explorer, a NASA satellite mission
Haplogroup DE (Y-DNA), a human Y-chromosome DNA haplogroup in genetics
ΔE (color space) (dE), a mathematical measurement of the distance between two points in a Lab color space

Condor Flugdienst, a German airline with IATA code DE
De (Chinese) (德), a concept of "integrity" in Daoism and "virtue" in Confucianism
Defensive end, a position in American and Canadian football
Distance education, studying through a correspondence course
Douwe Egberts, a coffee brand
Digital Extremes, a Canadian-operated computer and video game development studio
De, a scale degree in tonic sol-fa (sharpened form of doh)
John Deere, a company with NYSE stock ticker symbol "DE"