Twenty-three 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.
The global standard
The UN classification every other system on this site maps to.
Europe — the NACE family
NACE Rev. 2.1 and the national systems built on it. Eight of these are identical to NACE at levels 1–4, so conversions between them are one-to-one.
Statistical Classification of Economic Activities
European Union · Rev. 2.1 (2023) · 1,047 codes
Learn about NACEUK Standard Industrial Classification
United Kingdom · 2026 · 1,474 codes
Learn about UK SICClassificazione delle Attività Economiche
Italy · 2025 · 3,257 codes
Learn about ATECONomenclature d'Activités Française
France · 2025 · 1,794 codes
Learn about NAFKlassifikation der Wirtschaftszweige
Germany · 2025 · 2,030 codes
Learn about WZSvensk näringsgrensindelning
Sweden · 2025 · 1,882 codes
Learn about SNINomenclature Générale des Activités économiques
Switzerland · 2025 · 1,845 codes
Learn about NOGAPolska Klasyfikacja Działalności
Poland · 2025 · 1,775 codes
Learn about PKDClasificación Nacional de Actividades Económicas
Spain · 2025 · 1,060 codes
Learn about CNAENorth America — the NAICS family
The trilateral agreement between the US, Canada and Mexico, plus the legacy SIC bridge.
North American Industry Classification System
United States · 2022 · 2,125 codes
Learn about NAICSNorth American Industry Classification System (Canada)
Canada · 2022 v1.0 · 2,059 codes
Learn about NAICS CanadaSistema de Clasificación Industrial de América del Norte
Mexico · 2023 · 2,115 codes
Learn about SCIANStandard Industrial Classification
United States (legacy) · 1987 · 1,514 codes
Learn about SICEast Asia
Independently derived from ISIC, each with its own numbering.
Japan Standard Industrial Classification
Japan · Rev. 14 (2023) · 2,127 codes
Learn about JSICKorean Standard Industrial Classification
South Korea · Rev. 11 (2024) · 2,038 codes
Learn about KSICIndustrial Classification for National Economic Activities (GB/T 4754-2017)
China · GB/T 4754-2017 · 1,972 codes
Learn about ICNEAHong Kong Standard Industrial Classification
Hong Kong · Version 2.0 · 1,814 codes
Learn about HSICSouth & Southeast Asia, Oceania
ISIC-aligned national standards across the Indo-Pacific.
National Industrial Classification
India · 2025 · 2,717 codes
Learn about NICSingapore Standard Industrial Classification
Singapore · 2025 · 1,694 codes
Learn about SSICMalaysia Standard Industrial Classification
Malaysia · 2025 · 2,085 codes
Learn about MSICAustralian and New Zealand Standard Industrial Classification
Australia · New Zealand · 2006 Rev 2.0 · 825 codes
Learn about ANZSICLatin America
Renumbered against ISIC, so conversions are matched by meaning rather than by code.