- CARL stands for CART (Cloud and Radiation Testbed) Raman Lidar
- CARL stands for Combined Arms Research Library (Fort Leavenworth, KS, USA)
- CARL stands for Canadian Association of Research Libraries
- CARL stands for Child Abuse Report Line (Australia)
- CARL stands for Comprehensive Agrarian Reform Law (Philippines)
- CARL stands for Sandburg Home National Historic Site (US National Park Service)
- CARL stands for Colorado Alliance of Research Libraries
- CARL stands for Conservation and Recreation Lands
- CARL stands for Chemically Amplified Resist Lithography
- CARL stands for Computerized Activities Results List (US FEMA)
- CARL stands for Coating Applications Research Laboratory
- CARL stands for Chemical Amplification of Resist Lines
- CARL stands for Construction Automation & Robotics Laboratory (North Carolina State University)
- CARL stands for Compressor Aero Research Laboratory
- CARL stands for Comparative Animal Research Laboratory (Oak Ridge, TN)
- CARL stands for Citizen Action Request Line
- CARL stands for Conditional Average Run Length
- CARL stands for Colorado Association of Research Libraries, Inc.
- CARL stands for Calibration Requirements List
CARL