ACL

from Wikipedia:

ACL is a three-letter acronym that may refer to:

Companies and organizations

American Classical LeagueArctic Co-operatives LimitedAsianet Communications LimitedAssociation for Computational LinguisticsAteliers et Chantiers de la LoireAtlantic Coast Line RailroadAtlantic Container LineAustralian Christian Lobby

Sports

AFC Champions League, an annual Asian club football competition

Transportation

Cesar Airport, Aguaclara, Colombia (IATA airport code ACL)Acle railway station, UK, station code ACLAtlantic Coast Line, Cornwall, EnglandAtlantic City Line, New Jersey

Computing

ACL (software) formerly Audit Command LanguageAccess control list, a computer security conceptArbortext Command Language, a programming language for PTC Arbortext softwareAllegro Common Lisp, a commercial implementation of the Common Lisp programming languageAgent Communication Language, known also as FIPA-ACL, one of the most used communication language between intelligent agents

Other meanings

Anterior cruciate ligament of the kneeAustin City Limits, television showAustin City Limits Music Festival, music festivalAsynchronous Connection-Less, a data transmission link in the Bluetooth systemA Chorus Line, Broadway musicalAustralian Credit Licence, a license required by Australian lenders