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The National Standards of the Republic of China (CNS; Chinese: 中華民國國家標準; Pe̍h-ōe-jī: Tiong-hôa Bîn-kok Kok-ka Piau-chún) is the national standard of Taiwan, officially the Republic of China. These standards were established in 1946, and administered by the Bureau of Standards, Metrology and Inspection ("BSMI") of the Ministry of Economic Affairs of Taiwan. These standards are divided into 26 numbered categories. Applying the National Standards is voluntary unless authorities in charge cite any parts of the standards as laws and regulations. By the end of 2003, more than 15000 national standards have been issued. Although the Republic of China was removed in 1950 from the International Organization for Standardization (ISO) for failure to pay membership dues accordingly, there are still many National Standards translated from ISO standards into Chinese. A few standards also have English versions, but in case of any divergence of interpretation, the Chinese text shall prevail.

Selected Sections

Each standard has a general number and may be prefixed with "CNS", such as CNS 11296. The general numbers, English names and any similar ISO standards of some standards are listed below:

General number	English name	Similar ISO or IEC standard
5	Trimmed Sizes of Writing and Printing Paper	ISO 216
5205	Information Technology-7 Bit Coded Character Set for Information Interchange	ISO/IEC 646
7648	Data Elements and Interchange Formats—Information Interchange—Representation of Dates and Times	ISO 8601
7654	Information technology—Character code structure and extension techniques	ISO/IEC 2022
7656	Information processing—ISO 8-bit code for information interchange - Structure and rules for implementation	ISO/IEC 4873
8381	Information Interchange—Representation of Human Sexes	ISO 5218
9618	Diving Hoses^[1]
10987	The International System of Units (SI)	ISO 1000
11251	Diving Wet Suit^[2]
11296	General Principles Concerning Quantities, Units and Symbols	ISO 31
11643	Chinese Standard Interchange Code (for Generally Used Chinese Characters)
12497	Diving Mask^[3]
12498	Method of Test for Diving Mask^[4]
12680	Quality management systems - Fundamentals and vocabulary	ISO 9000
12842	Codes for the Representation of Names of Countries	ISO 3166
12864	Documentation - International Standard Book Numbering (ISBN)	ISO 2108
12873	Codes for the Representation of Currencies and Funds	ISO 4217
13188	Code for the Representation of Names of Languages	ISO 639
13246	Information technology—8-bit single-byte coded graphic character sets - Part 1: Latin alphabet No. 1	ISO/IEC 8859-1
13247	Information technology—8-bit single-byte coded graphic character sets - Part 2: Latin alphabet No. 2	ISO/IEC 8859-2
13325	Information technology—8-bit single-byte coded graphic character sets - Part 3: Latin alphabet No. 3	ISO/IEC 8859-3
13326	Information technology—8-bit single-byte coded graphic character sets - Part 4: Latin alphabet No. 4	ISO/IEC 8859-4
13327	Information technology—8-bit single-byte coded graphic character sets - Part 5: Latin / Cyrillic alphabet	ISO/IEC 8859-5
13328	Information technology—8-bit single-byte coded graphic character sets - Part 9: Latin alphabet No. 5	ISO/IEC 8859-9
13384	Information technology—8-bit single-byte coded graphic character sets - Part 6: Latin / Arabic alphabet	ISO/IEC 8859-6
13385	Information technology—8-bit single-byte coded graphic character sets - Part 7: Latin / Greek alphabet	ISO/IEC 8859-7
13386	Information technology—8-bit single-byte coded graphic character sets - Part 8: Latin / Hebrew alphabet	ISO/IEC 8859-8
13524	Standard Representation of Latitude, Longitude and Altitude for Geographic Point Locations	ISO 6709
13611	Bibliographic References: Content, Form and Structure	ISO 690
14001	Environmental Management Systems—Specification with Guidance for Use	ISO 14001
14336	Safety of information technology equipment	IEC 60950
14614	Eye and face protection for sports use − Part 3: Requirements and test methods for eyewear intended to be used for surface swimming^[5]
14649	Information Technology—Universal Multiple-Octet Coded Character Set (UCS)	ISO/IEC 10646

References

^ "國家標準(CNS)網路服務系統檢索". www.cnsonline.com.tw. Retrieved 2024-10-11.
^ Bureau of Standards, Metrology and Inspection: CNS 11251: 濕式潛水衣. Diving Wet Suit, Bureau of Standards, Metrology and Inspection, Republic of China. Retrieved 1 October 2022 at https://www.cnsonline.com.tw/?node=result&generalno=11251&locale=zh_TW.
^ Bureau of Standards, Metrology and Inspection: CNS 12497: 潛水鏡. Diving Mask, Bureau of Standards, Metrology and Inspection, Republic of China. Retrieved 1 October 2022 at https://www.cnsonline.com.tw/?node=result&generalno=12497&locale=zh_TW.
^ Bureau of Standards, Metrology and Inspection: CNS 12498: 潛水鏡檢驗法. Method of Test for Diving Mask, Bureau of Standards, Metrology and Inspection, Republic of China. Retrieved 1 October 2022 at https://www.cnsonline.com.tw/?node=result&generalno=12498&locale=zh_TW.
^ Bureau of Standards, Metrology and Inspection: CNS 14614: 運動用之眼部及面部防護－第3部：水面游泳用眼睛配戴物之要求及試驗法. Eye and face protection for sports use − Part 3: Requirements and test methods for eyewear intended to be used for surface swimming, Bureau of Standards, Metrology and Inspection, Republic of China. Retrieved 1 October 2022 at https://www.cnsonline.com.tw/?node=result&generalno=14614&locale=zh_TW.