The Harmonized Commodity Description and Coding System, also known as the Harmonized System of tariff nomenclature is an internationally standardized system of names and numbers to classify traded products.

an internationally agreed-upon standard managed by the United Nations that was set up to replace the assortment of hazardous material classification and labelling schemes previously used around the world.

The Harmonized Tariff Schedule of the United States, also referred to as the Harmonized Tariff Schedule of the United States Annotated, is the primary resource for determining tariff (customs duties) classifications for goods imported into the United States.

The harmonized sales tax is a consumption tax in Canada.