ABL

ABL may refer to:

In medicine

OpenEdge Advanced Business Language, a business application development language created and maintained by Progress Software Corporation

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

Activity-based learning, a range of pedagogical approaches to teaching based on doing some hands on experiment and activities
Ablative case
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
A Block diagram Language, a hardware description language
Advanced Business Language, the new name for Progress 4GL
Airborne Laser, a weapons system designed for use by the United States military
Alameda Belt Line railroad
Allegany Ballistics Laboratory
Asset-based lending
Air Busan of South Korea (ICAO airline code)
Ambler Airport in Alaska (IATA airport code)
Armored Box Launcher, a launch container for the BGM-109 Tomahawk cruise missile
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
NSW Business Chamber, formerly Australian Business Limited, a business organisation
Academia Brasileira de Letras (Brazilian Academy of Letters)