MDL

• Mazagon Dock Limited, a company with shipyards in Mumbai, India
• MDL Information Systems, a company formerly named Molecular Design Limited

• Museum of Dartmoor Life, Oakhampton, Devon, England
• Mandalay International Airport (IATA airport code: MDL), Myanmar
• Military Demarcation Line, a truce border line between North and South Korea

• Method detection limit, of a chemical substance

• Fayyad & Irani's MDL method, a discretization method
• MDL (programming language), derived from LISP
• .mdl, the file extension for Valve's Source and ID Software's IDTech game engines proprietary model file format
• Microsoft Design Language, a design language
• Minimum description length, a principle for inductive inference in information theory
• Mobile driver's license, a mobile app that replaces a physical driver's license

• Moldovan leu, the currency of Moldova
• Multidistrict litigation, US consolidation of complex litigation
• 1550 (Roman numeral), a year

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