KS (Korean Industrial Standards) are Korean National Standards developed, reviewed and notified uner the Korean Industrial Standardization Act.

KS may be divided into 21 sectors ranging from the Basic standards (A) to the Information (X), as well as it may be classified into 3 types of standards as follows:

Product Standards Specifying improvement, measurement and quality of product
Procedure Standards Specifying testing, analysis, inspection, measurement method and process standard, etc.
Horizontal Standards Specifying terminology, technical characteristics, unit and numerical progression, etc.