ATB may refer to:

• Amsterdam Trade Bank, a Dutch bank
• Arab Tunisian Bank, a financial institution formed partly by Arab Bank
• ATB Financial (Alberta Treasury Branches), a financial institution owned by the Alberta government

• Active Time Battle system, a feature of role-playing games
• All trunks busy, the reorder tone, or fast busy tone, on public switched telephone networks
• ATB (Advanced trace bus), a protocol in the Advanced Microcontroller Bus Architecture protocol specification.

• ATB (DJ) (born 1973), German DJ and music producer
• Andy Timmons Band, a band led by guitarist Andy Timmons
• Atelier-Théâtre Burkinabé, a Burkinabè theatre group
• After the Burial, an American extreme metal band

• All terrain bike, or mountain bike, an off-road bicycle
• All terrain boarding, an extreme sport also known as mountain boarding
• Around the Bay Road Race, a 30 km road race held every March in Hamilton, Ontario, Canada

• AtB, the public transit company of Trøndelag County Municipality, Norway
• Articulated tug and barge, a type of tugboat
• Automatische treinbeïnvloeding, a Dutch system of automatic train protection
• Advanced Technology Bomber, the program under which the B-2 Spirit stealth bomber was developed

• Ability to benefit, in the United States, a measure applicable to students who have sufficient competency to benefit from post-secondary education but do not have a high school diploma or equivalent
• ATB-Market, a Ukrainian network of retail shops
• Red ATB, a Bolivian television channel
• ATB Place, Edmonton, Alberta, Canada; a plaza
• Zaiwa language (ISO 639 code: atb)

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• America the Beautiful (disambiguation)
• All pages with titles beginning with ATB
• All pages with titles containing ATB

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