ATB

ATB may refer to:

Arts and entertainment

 * ATB (DJ) (born 1973), German DJ and music producer
 * Active Time Battle system, a feature of role-playing games
 * 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

Banking

 * 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

Computing and telecommunications

 * 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.

Sports

 * All terrain bike, an off-road bicycle now best known as mountain bike
 * 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

Transportation and vehicles

 * 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

Other uses

 * 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)