DE, de, or dE may refer to:

Language

• "De" is a preposition meaning "of" or "from" in a number of Romance Languages such as French and Spanish, and is often evident in the names of people, places, and things
• De (Cyrillic), a letter in the Cyrillic alphabet
• "De", a particle of nobility in French names.
• "De", the Dutch article for both male and female words.
• "De", the Hungarian word for "But"

Codes

• "DE", Germany (ISO 3166-1 alpha-2 country code, from German Deutschland)
• "DE", German language (ISO 639 alpha-2, from German Deutsch)
• Delaware (U.S. state postal symbol)
• "DE", IATA airline designator for Condor Airlines

Science

• Differential equation, in mathematics, an equation in which the derivatives of a function appear as variables
• Diatomaceous earth, a mineral
• "dE", the classification for a dwarf elliptical galaxy.
• "De", in Morse Code, refers to the "from" in a callsign exchange

Other

• De, the concept of virtue in Daoism
• Destroyer escort, US Navy hull classification symbol
• Desert Eagle, a large-caliber autopistol manufactured by Magnum Research, inc.
• Dark Elf, a fantasy race
• Desktop environment, in computing
• Deus Ex, a video game
• Digital Extremes, a video game publisher
• Douwe Egberts, a coffee brand

Abbreviations

DE | DE | De | DE | DE | De | DE | DE | DE | DE | De | DE