A second international standard on quantities and units wasIEC 60027.[2] The ISO 31 and IEC 60027 Standards were revised by the two standardization organizations in collaboration ([1],[2]) to integrate both standards into a joint standardISO/IEC 80000 - Quantities and Units in which the quantities and equations used with SI are to be referred as theInternational System of Quantities (ISQ). ISO/IEC 80000 supersedes both ISO 31 and part of IEC 60027.
Canada: CAN/CSA-Z234-1-89 Canadian Metric Practice Guide (covers some aspects of ISO 31-0, but is not a comprehensive list of physical quantities comparable to ISO 31)
United States: There are several nationalSI guidance documents, such asNIST SP 811,NIST SP 330,NIST SP 814, IEEE/ASTM SI 10, SAE J916. These cover many aspects of the ISO 31-0 standard, but lack the comprehensive list of quantities and units defined in the remaining parts of ISO 31.
BIPM – publishes freely available information on SI units[3], which overlaps with some of the material covered inISO 31-0
IUPAP – much of the material in ISO 31 comes originally from Document IUPAP-25 of theCommission for Symbols, Units and Nomenclature (SUN Commission)[4] of theInternational Union of Pure and Applied Physics
IUPAC – some of the material in ISO 31 originates from theInterdivisional Committee on Terminology, Nomenclature and Symbols[5] of theInternational Union of Pure and Applied Chemistry
IEC 60027 Letter symbols to be used in electrical technology
ISO 1000 SI Units and Recommendations for the use of their multiples and of certain other units (bundled with ISO 31 as theISO Standards Handbook – Quantities and units)
^Tolga, G. O. K. (2016). The importance of symbols and units in natural science. The Eurasia Proceedings of Educational and Social Sciences, 4, 165-167.
^Mills, I. (1993). Quantities, units and symbols in physical chemistry/prepared for publication by Ian Mills...[et al.]. Oxford; Boston: Blackwell Science; Boca Raton, Fla.: CRC Press [distributor].
^Taylor, B. (1995). Guide for the use of the International System of Units (SI): the metric system. DIANE Publishing.
^Sertlek, H. Ö.; Slabbekoorn, H.; Ten Cate, C.; Ainslie, M. A. (2019). "Source specific sound mapping: Spatial, temporal and spectral distribution of sound in the Dutch North Sea".Environmental Pollution.247:1143–1157.Bibcode:2019EPoll.247.1143S.doi:10.1016/j.envpol.2019.01.119.PMID30823343.
