CLR may refer to:

Organizations

• Chief Langalibalele Rifles, an infantry regiment of the South African Army
• Combat Logistics Regiment, a type of United States Marine Corps regiment
• Commando Logistic Regiment, a logistic regiment of the Royal Marines
• Compagnie Luxembourgeoise de Radiodiffusion, a Luxembourg-based radio-broadcaster, part of RTL Group
• CLR (formerly Computer Language Research), a subsidiary of Thomson Reuters Tax & Accounting
• Council on Library Resources, USA
• Circle of Liberal Reformers, a political party in Gabon

Publications

• California Law Review, a publication by the UC Berkeley School of Law
• Commonwealth Law Reports, reports of decisions of the High Court of Australia
• Introduction to Algorithms by Cormen, Leiserson, and Rivest, nicknamed for its authors' initials

Technology

• "clear" instruction, in some computer programming assembly languages
• Centerline Radius, a term in the tubing industry used to describe the radius of a bend
• Circuit layout record, in the telecommunications industry
• Common Language Runtime, the virtual-machine component of Microsoft .NET
• Compensation Log Record, a type of database log record
• Current-Limiting Resistor, an electronic component
• Mercedes-Benz CLR, a racing-car

Other uses

• Calcium Lime Rust, a household cleaning product
• Central London Railway, an underground railway line in London, now part of the London Underground's Central line
• Cliff Hatfield Memorial Airport, an airport in Calipatria, California
• Coffee leaf rust, a plant disease caused by the fungus Hemileia vastatrix
• Command, Leadership, Resource management, another acronym for Cockpit Resource Management