LDA

LDA may refer to:

Aviation

 * Localizer type directional aid, an instrument approach to an airport
 * Landing distance available, the length of runway that is available for the ground run of an airplane landing

Law

 * Legal document assistant, a non-lawyer authorized to assist with the preparation of legal instruments
 * Lobbying Disclosure Act of 1995, legislation in the United States
 * Legal drinking age, the minimum age at which one can legally consume alcohol

Medicine

 * Left-displaced abomasum, condition of ruminants
 * Low dose allergens, a variant of enzyme potentiated desensitization

Science and technology

 * Laser Doppler anemometry, technique to measure velocity
 * Latent Dirichlet allocation, a generative statistical model
 * Linear diode array, used for digitizing x-ray images
 * Linear discriminant analysis, a type of statistical analysis
 * Lithium diisopropylamide, a strong base in chemistry
 * Local delivery agent, software that delivers e-mail messages
 * Local-density approximation, in quantum-mechanical density functional theory
 * Low density amorphous ice, an amorphous solid form of water
 * Lobate debris apron, a type of geologic feature observed on Mars

Organizations

 * Lahore Development Authority, agency in Lahore, Pakistan
 * Liga Deportiva Alajuelense, a Costa Rican football club
 * London Democratic Association, 19th century organisation in England
 * London Development Agency, regional development agency for the London region in England
 * Lord's Day Alliance, an ecumenical Christian first-day Sabbatarian organization

Other uses

 * LDA (singer)
 * Little Dark Age, a 2018 studio album by MGMT