The classification used for compiling Turkey's foreign trade statistics is the Harmonized System (HS) 12-digit. The first 8-digit (CN) is international and the last 4-digit is national. Furthermore, the data are available in SITC Rev.4, SITC Rev.3, SITC Rev.2, ISIC Rev.4, ISIC Rev.3, ISIC Rev.2, BEC, CPA, CPC and NST2007 classifications.

European Union's country classification Geonomenclature is used in classification of countries.

Classification of product group by technology intensity was prepared by OECD based on ISIC Rev.3 classification.

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