| Adjective Checklist Psychology | Academic & Science |
| Academy of Sciences of Lisbon | Academic & Science |
| Academia das Ciências de Lisboa | Academic & Science |
| Audit Control Language | Academic & Science |
| Association for Computation Linguistics | Academic & Science |
| Aguaclara | Airport Code |
| ACAL, P.L.C. Ordinary shares | Business |
| Alchemia Ltd | Business |
| Ace, LTD. | Business |
| Automotive Components Limited | Business |
| Applied Color Label | Business |
| Acyl-homoserine Lactone | Chemistry |
| Association of Christian Librarians | Community |
| Administration for Community Living | Community |
| Association For Community Living | Community |
| Association of Computational Linguistics | Community |
| Approved Carriers List | Community |
| Authentic Christian Living | Community |
| All Community Luck | Community |
| Academy for Church Leadership | Community |
| American Classical League | Community |
| Association for Computational Linguistics | Computing |
| Automatic Correction List | Computing |
| Advanced Cmos Logic | Computing |
| Application Component Library | Computing |
| Automatic Cartridge Loader | Computing |
| Application Control Layer | Computing |
| Application Connectivity Link | Computing |
| Allegro Common Lisp | Computing |
| Applications Control Link | Computing |
| Agent Content Language | Computing |
| Audit Command Language | Computing |
| Aliasing Controlling Language | Electronics |
| Microsoft Office Auto-correct List | File Type |
| Corel Draw 6 Keyboard Accelerator | File Type |
| Another Classless Laker | General |
| A Continuous Lean | General |
| Anterior Cruciate Liga | General |
| Access Control Levels | General |
| Application Compatibility Layer | General |
| Anterior Cruciate Ligaments | General |
| Altimeter Check Location | General |
| Access Control Layer | General |
| Absolutely Continuous On Lines | General |
| American Cornhole League | General |
| Access Central Limit | General |
| Audiophile Circuits League | General |
| Auto Choke Linkage | General |
| Air Cleaner | General |
| Automobile Club du Luxembourg | General |
| Ateliers de Construction du Livradois | General |
| Automatic Clutch | General |
| Acute Left | General |
| Automatic Chassis Lubrication | General |
| Alpine Club du Luxembourg | General |
| Axle Collar | General |
| Active Cornering Lights | General |
| Automotive Components Laboratory | General |
| Autocar Constructor Long | General |
| American Cars Legend | General |
| Austrian Chauffeur Limousines | General |
| American Coach Limousine | General |
| Automobile Club Liegeois | General |
| Angels Crucial Leg | Governmental |
| Armored Combat League | Governmental |
| Australian Current Law | Governmental |
| ANCHELI | Indian Railway Station |
| Access Control List | Information Technology |
| Active Current Loop | Information Technology |
| Account Coverage Level | Insurance |
| Approved Contractor List | International |
| Asian Composers League | International |
| Acción Ciudadana Liberal | International |
| Alianza de Castile y Lean | International |
| A Changed Life | Medical |
| Anti-CardioLipin | Medical |
| Allen cognitive levels test Psychology | Medical |
| alternative concentration limits Environment | Medical |
| aminocaprolactam | Medical |
| Analytical Chemistry Lab | Medical |
| Automated Coagulation Lab | Medical |
| Aerospace Controls Laboratory | Medical |
| Anterior Cruciate Ligament | Medical |
| Anterior Clavicular Line | Medical |
| anticardiolipin antibodies | Medical |
| Allowable Cabin Load | Military and Defence |
| Allowable Cargo Load | Military and Defence |
| Aircraft Cabin Load | Military and Defence |
| Access Control Level | Military and Defence |
| Antrix Corporation Limited | Miniratna Central Public Sector Enterprise |
| Asynchronous Connectionless Link | Networking |
| Agent Communication Language | Networking |
| Atlantic CoastLine | Regional |
| Australian Credit Licence | Regional |
| Australian Cyber League | Regional |
| CSX Transportation Incorporated (Formerly Atlantic Coast Line) | Regional |
| Atlantic Coast Line Railroad (CSX Transportation) | Regional |
| Agent Communication Library | Softwares |
| Average Call Length | Telecommunication |
| Asynchronous Connection-less | Telecommunication |
