ABL

ABL may refer to:

In medicine

 * ABL (gene), a proto-oncogene associated with chronic myelogenous leukemia
 * Abetalipoproteinemia, a rare genetic disorder
 * Accidental bowel leakage, also known as fecal incontinence

Computing

 * A Block diagram Language, a hardware description language
 * Advanced Business Language, the new name for Progress 4GL
 * OpenEdge Advanced Business Language, a business application development language created and maintained by Progress Software Corporation

Sports

 * African Basketball League
 * Alaska Baseball League
 * American Basketball League, a name that has been used by three defunct basketball leagues in the United States:
 * American Basketball League (1925–1955), an early professional basketball league
 * American Basketball League (1961–1962), a league that only played a single full season
 * American Basketball League (1996–1998), a women's basketball league
 * American Basketball League (2013–2015), a semi-professional men's basketball league
 * ASEAN Basketball League, a professional basketball league for ASEAN nations
 * Australian Baseball League:
 * Australian Baseball League (1989–1999) (defunct)
 * Australian Baseball League
 * AL-Bank Ligaen, a former name for Denmark's top men's ice hockey league

Entertainment

 * A Beautiful Lie, 30 Seconds to Mars's second studio album
 * A Bug's Life, a 1998 film
 * A Bug's Life (video game), the video game based on the film

Military and weaponry

 * Airborne Laser, a weapons system designed for use by the United States military
 * Allegany Ballistics Laboratory
 * Armored Box Launcher, a launch container for the BGM-109 Tomahawk cruise missile

Companies, groups, organizations

 * ABL Space Systems
 * Alameda Belt Line railroad
 * Air Busan of South Korea (ICAO airline code)
 * NSW Business Chamber, formerly Australian Business Limited, a business organisation
 * Academia Brasileira de Letras (Brazilian Academy of Letters)

Other uses

 * Activity-based learning, a range of pedagogical approaches to teaching based on doing some hands-on experiment and activities
 * , glossing abbreviation for ablative case
 * Asset-based lending
 * Ambler Airport in Alaska (IATA airport code)
 * Atmospheric boundary layer, the region where the atmosphere interacts with the surface of the earth
 * Australian bat lyssavirus, a rabies-like virus found in Australian bats
 * Lampung Nyo language, an Austronesian language of Indonesia, by ISO 639-3 language code