Delta may refer to:

• Delta (letter), the letter Δ or δ in the Greek alphabet, also used as a mathematical symbol.

• In geography:
  • River delta, a triangular area of alluvial deposit at the mouth of a river
  • Tropical Storm Delta (2005)

• In mathematics and computer science:
  • the Kronecker delta, a function of two variables which is 1 when they are equal
  • the Dirac delta function, a distribution used as an approximation for a spike function
  • Delta encoding, a technique in computer communications and version-control

• In mathematical finance
  • one of the Greeks used in option and derivatives pricing

• Companies and products:
  • Delta Air Lines, a major U.S. airline
  • Delta Faucet Company, a plumbing fixtures company
  • Delta Holding, an import-export, banking, insurance and retail corporation in Serbia and Montenegro
  • Delta Machinery, a stationary power tools and equipment company
  • Delta (computer), a Russian ZX Spectrum clone
  • Delta Robot, a specialized type of robot
  • Delta rocket, a family of rockets built by Boeing IDS
  • GM Delta platform, a compact car automobile platform from General Motors
  • Lancia Delta, a famous rally car made by Italian company Lancia
  • Visa Delta, a debit card
  • Delta Environmental Consultants, and environmental remediation company based in St. Paul, MN

• In entertainment and fiction:
  • Delta (computer game), a 1987 horizontally-scrolling shooter computer game
  • Delta Dance, a Eurobeat music label
  • EX Delta Species, a Pokémon Trading Card Game expansion
  • Delta Quadrant, a quadrant of the Milky Way Galaxy depicted in Star Trek
  • Delta FM, a UK radio station

• Special forces:
  • Delta Force, a U.S. Army special force
  • Beredskapstroppen, a norwegian special police forces team (equivalent to SWAT)

• Delta Works, a flood-protection works in the Netherlands

Abbreviations

• DELTA (ELT), an advanced diploma in English language teaching
• DELTA (taxonomy), the DEscription Language for TAxonomy

People

• Delta Goodrem, Australian singer and actress
• Delta Burke, American actress

Places

• Canada
  • Delta, British Columbia
    • Delta (provincial electoral district)
    • Delta (electoral district) a federal electoral district, 2003-present
• Nigeria
  • Delta State, Nigeria
• United States
  • Delta, Colorado
  • Delta, Iowa
  • Delta, Kentucky
  • Delta, Louisiana
  • Delta, Missouri
  • Delta, Ohio
  • Delta, Pennsylvania
  • Delta, Utah
  • Delta, Wisconsin
  • Mississippi Delta, an alluvial plain in the state of Mississippi

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