| Acronym | Definition |
|---|
| ALCS➣American League Championship Series (baseball) |
| ALCS➣Airline Control System |
| ALCS➣Authors' Licensing and Collecting Society (UK) |
| ALCS➣Airborne Launch Control System |
| ALCS➣Association for Low Countries Studies in Great Britain and Ireland (UK) |
| ALCS➣Atonement Lutheran Church and School (Metairie, LA) |
| ALCS➣Airlift Control Squadron |
| ALCS➣Airfield Lighting Control and Monitoring System (also seen as ALCMS) |
| ALCS➣Augmented Longitudinal Control System (NASA) |
| ALCS➣Advance Liberty for Change Seminar (Centre for Civil Society; India) |
| ALCS➣Analytical Laboratory Computer System |
| ALCS➣Authors' Lending and Copyright Society (UK) |
| ALCS➣Active Laser Countermeasure System |
| ALCS➣Application Life Cycle Solution |
| ALCS➣Automated Logistics Control System |
| ALCS➣Acoustic Link Control Software |
| ALCS➣Automated Laboratory Control System |