LLL

LLL may refer to:

Businesses and organisations

 * L3 Technologies, an American defense contractor formerly with the NYSE stock symbol LLL
 * La Leche League, an organization that promotes breastfeeding

Education

 * LL.L (Legum Licentiatus), a degree in civil law at various Canadian universities (especially in Québec)
 * Lifelong learning
 * Lambda Lambda Lambda, a co-ed fraternity

Entertainment

 * Leisure Suit Larry in the Land of the Lounge Lizards, the first of a series of video games
 * Love's Labour's Lost, a comedy by William Shakespeare
 * Landau, Luckman, and Lake, a fictional holding company in Marvel Comics
 * LLL, the production code for the 1972 Doctor Who serial The Sea Devils
 * "L. L. L.", a 2015 song by Myth & Roid
 * "Loo Loo Land", a 2020 episode of Helluva Boss

Military units

 * Loyal Lusitanian Legion, a foreign volunteer corps of the British Army, that fought in the Peninsular War

Religion

 * Lutheran Laymen's League, also known as Lutheran Hour Ministries, a Christian outreach ministry
 * "Lunatic, Liar, or Lord", a common summary of Lewis's trilemma, a theological argument from C. S. Lewis

Science, technology, computing

 * Low-level programming language, such as machine code or assembly
 * Lenstra–Lenstra–Lovász lattice basis reduction algorithm, a polynomial time lattice reduction algorithm
 * Lowest Landau level, wave functions in quantum mechanics
 * Lovász local lemma, a lemma in probability theory
 * Lawrence Livermore Laboratory, now known as Lawrence Livermore National Laboratory, a scientific research laboratory in the United States
 * One of the programming languages used in Ethereum