DB

DB may refer to:

In science and technology:

• Decibel (dB), a logarithmic unit of measurement in acoustics and electronics
• Dubnium (Db), a chemical element
• DB connector, a size of D-subminiature electrical connector
• Berkeley DB, a cross-platform embedded database library
• .db, a database file extension

In entertainment:

• D♭ (musical note)
• Daily Bugle, a fictional New York City newspaper
• The dB's, a power pop band from the 1980s
• DJ DB, a New York based drum 'n' bass dj

In locations:

• Daytona Beach, Florida
• Diamond Bar, California
• Discovery Bay, a residential development in Hong Kong
• Dobyns Bennett High School, a high school in Kingsport, Tennessee, USA
• Dâmboviţa County, a county in Romania, ISO 3166-2:RO code

In business:

• DB Breweries, a New Zealand company
• DB Medialab, a Norwegian online media company owned by the newspaper Dagbladet
• DB Records, a label in Atlanta, Georgia, USA
• Deutsche Bank, a German bank
• Diamond Bank of Nigeria
• Doing Business Report by the World Bank Group
• Defined benefit pension plan a scheme for retirement plans

In transportation:

• DB Draw, a bridge over the Passaic River, USA
• DB (car), a French automobile maker
• Deutsche Bundesbahn, the national railway company of the Federal Republic of Germany from 1949 until 1994
• Deutsche Bahn, the major German railway company since 1994
• David Brown (entrepreneur), one-time owner of car manufacturer Aston Martin, several of whose products carried his initials
• Dublin Bus, the principal bus operator in the Geater Dublin Area of Ireland

In other uses:

• db.no, the online version of the Norwegian newspaper Dagbladet
• ȸ, the db-digraph a ligature of "d" and "b" in African linguistics
• Defensive back, a position in American football and Canadian football
• dyne:bolic, a GNU/Linux distribution
• douche bag, a general insult, especially when texting or other communication media
• D. B. Cooper, a hijacker