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 Central London Railway, which became part of the London Underground

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 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 , measure of debt vs income