Classification systems
Eleven systems, one mental model.
Each system classifies the same economic activity from a different vantage point. Learn how each is built, its history, and where it's used.
ISIC
International Standard Industrial Classification
United Nations (global) · Revision 5 (2024) · 830 codes
Learn about ISICNAICS
North American Industry Classification System
United States · 2022 · 2,125 codes
Learn about NAICSNAICS Canada
North American Industry Classification System (Canada)
Canada · 2022 v1.0 · 2,059 codes
Learn about NAICS CanadaSCIAN
Sistema de Clasificación Industrial de América del Norte
Mexico · 2023 · 2,115 codes
Learn about SCIANSIC
Standard Industrial Classification
United States (legacy) · 1987 · 1,514 codes
Learn about SICUK SIC
UK Standard Industrial Classification
United Kingdom · 2026 · 1,994 codes
Learn about UK SICNACE
Statistical Classification of Economic Activities
European Union · Rev. 2.1 (2023) · 1,047 codes
Learn about NACENIC
National Industrial Classification
India · 2025 · 2,717 codes
Learn about NICANZSIC
Australian and New Zealand Standard Industrial Classification
Australia · New Zealand · 2006 Rev 2.0 · 825 codes
Learn about ANZSICJSIC
Japan Standard Industrial Classification
Japan · Rev. 14 (2023) · 2,127 codes
Learn about JSICICNEA
Industrial Classification for National Economic Activities (GB/T 4754-2017)
China · GB/T 4754-2017 · 1,972 codes
Learn about ICNEA