- ALS
ALS may refer to:
*Acetolactate synthase , an enzyme involved in amino acid biosynthesis
*Albany Law School , a private law school in Albany, New York, United States
*Alexander Language Schools International
* Als, a Danish island in the Baltic Sea
*Amyotrophic lateral sclerosis , also known as Lou Gehrig's disease
*Advanced Life Support , a protocol for cardiopulmonary resuscitation
*Advanced Light Source , a synchrotron radiation source at Lawrence Berkeley National Laboratory in California
*Anti-Lag System , an engine control program used on race cars to eliminate turbo lag
*Anterolateral system , a nerve pathway mainly signaling pain and temperature
*Approach lighting system , a lighting system installed on the approach end of an airport runway
*Audio Lossless Coding , part of the MPEG-4 standard for audio/video compression
*Airman Leadership School , the first-level professional military education program for United States Air Force enlisted members
*Alliance for the Liberation of Somalia
* ALS,San Luis Valley Regional Airport 's IATA airport code
*Autographed Letter Signed
* als, the ISO 639-3 code forTosk Albanian
* Automated library system orintegrated library system
*Automatic Laser Shutdown
*Alternate line service , a GSM feature for supporting two different phone numbers on the same mobile device.
*Singapore Area Licensing Scheme
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