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Leo Roos

Internationally, which is the correct abbreviation for second: s or sec?

Daniel Cook  Follow

According to the SI (metric) manual, seconds are always abbreviated “s”.

This also allows for having prefixes such as “ms” for milliseconds.

Feel free to download a copy of the manual at BIPM:
www.bipm.org/en/publications/si-brochure/

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Andrea Saez  Follow

Presumably “SI” (Système International, International System of Units - Wikipedia) fits “international”. In SI the abbreviation is s.

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