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 (1925–55), an early professional basketball league American Basketball League (1961–63), a league that only played a single full season American Basketball League (1996–98), a women's basketball league American Basketball League (2013), a semi-professional men's basketball league ASEAN Basketball League, a professional basketball league for ASEAN nations Australian Baseball League: Australian Baseball League (1989–99) (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 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 See also AB1 (disambiguation) ABI (disambiguation) able (disambiguation)