ADB is a three-letter acronym that may refer to the intergovernmental organizations:

• The African Development Bank (also AfDB), a non-profit financial institution whose aim is to help developing African countries
• The Asian Development Bank, a non-profit financial institution whose aim is to help developing Asian countries

ADB may also refer to:

In banking[link]

• Agricultural Development Bank (disambiguation), a name shared by several financial institutions, including:
  • Agricultural Development Bank of Ghana
  • Agricultural Development Bank of Pakistan
  • Agricultural Development Bank of Trinidad and Tobago

In computing and technology[link]

• Advanced Debugger, a general purpose debugger for UNIX platforms
• Advanced Digital Broadcast, supplier of digital TV set-top-boxes for cable, satellite, terrestrial and telecommunications
• Android Debug Bridge, a debugging command-line tool to help debugging Android-powered devices
• Apple Desktop Bus, a bit-serial computer bus for connecting low-speed devices to computers

In gaming[link]

• Active Dimension Battle, a battle system in computer gaming
• Amarillo Design Bureau Inc., the producer of the Star Fleet Universe series of games and related background material

In literature and publications[link]

• Allgemeine Deutsche Biographie, a biographical reference work in the German language
• Australian Dictionary of Biography, Australia's pre-eminent dictionary of national biography

In other uses[link]

• Adnan Menderes Airport, the IATA airport code for the airport in Izmir, Turkey

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