ALSA or alsa may refer to:
Advanced Linux Sound Architecture, a Linux kernel component Air Land Sea Application Center, an organization of the United States Department of Defense responsible for developing tactics and procedures Airline Stewardess Association, a trade union ALS Association, an American non-profit organization dealing with amyotrophic lateral sclerosis (ALS) or Lou Gehrig's disease Alsa (bus company), based in Spain Australian Law Students' Association, an Australian law student organisation Harees, a Mappila dish in Kerala, south India, alternatively called alsa)
es:ALSA