Late Stone Age (Neolithic)

Local Spiritual Assembly, an administrative body of the Bahá'í Faith.

Latent semantic analysis

Latvijas Studentu apvienība

Lichen sclerosus et atrophicus (Skin disease)

Lone Scouts of America, an independent Scouting organization that merged into the Boy Scouts of America

Link-state advertisement

Light-sport aircraft

Lysergic acid amide (ergine), a compound closely related to LSD

Linguistic Society of America

Local Security Authority, the centre of the Windows NT security subsystem (lsass.exe).

Licenciate of the Society of Apothecaries

College of Literature, Science, and the Arts at the University of Michigan

London Small Arms Co. Ltd, an English gun-making firm between 1866-1935.

Lutheran Services in America, the largest network of human service organizations in the United States.

Linseed Sunflower Almond, a mix used in Dr Sandra Cabot's Liver Cleansing Diet (Linseed is called Flaxseed in the USA)

Logistics Support Area, a large military depot.

Learn and Serve America

Law and Society Association

Logistics Support Analysis, a support planning methodology.

La Salle Academy, a private, Catholic, all boys high school in New York City.

LHC Software Applications (computer software package to control the Super Proton Synchrotron and the Large Hadron Collider at CERN)

Autonomous Systems Laboratory or Laboratório Sistemas Autónomos it's a research unit of the Institute of Engineering of the Porto, a school of the Porto Polytechnic Institute.