DZ, Dz, or dz may refer to:

Businesses and organizations

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In language

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People

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In science and technology

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Other uses

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  • Algeria (ISO 3166-1 country code)
    • .dz, Algeria's internet country code top-level domain (ccTLD)
  • Demilitarized zone, a buffer zone between military powers
  • Drop zone, as in a parachuting drop zone
  • contraction for dozen