HCL
# HCL

HCL may refer to:

## Science and medicine

* Hairy cell leukemia, an uncommon and slowly progressing B cell leukemia
* Harvard Cyclotron Laboratory, from 1961 to 2002, a proton accelerator used for research and development
* Hollow-cathode lamp, a spectral line source used in physics and chemistry
* Hydrochloric acid, a solution of hydrogen chloride in water
* Hydrochloride, the salt of hydrochloric acid and an organic base
* Hydrogen chloride, chemical formula HCl
* Hypomania Checklist, a questionnaire used to screen for hypomania and bipolar spectrum disorders
* HCL color space, a color space model designed to accord with human perception of color

## Computing

* Hardware compatibility list
* HashiCorp Configuration Language, a configuration language authored by HashiCorp, used by cloud infrastructure automation tools, such as Terraform.

## Organizations

* HCLTech, an IT outsourcing firm based in Noida, India

   * HCL Axon, a subsidiary of HCL Technologies
* Hennepin County Library
* Hindustan Cables Limited, an Indian cable manufacturer
* Harvard College Library
* HC Lugano, a Swiss professional ice hockey team based in Lugano
* Honolulu Control Facility, an air traffic control facility
* Horizon Coach Lines, an American bus company
