ISO 80000 or IEC 80000, Quantities and units, is an international standard describing the International System of Quantities (ISQ). It was developed and...

by ISO/IEC 80000-3:2007) ISO 31-2: Periodic and related phenomena (replaced by ISO/IEC 80000-3:2007) ISO 31-3: Mechanics (replaced by ISO/IEC 80000-4:2006)...

and technology. It was superseded in 2009 by ISO 80000-2:2009 and subsequently revised in 2019 as ISO-80000-2:2019. Its definitions include the following:...

to space and time. It was superseded in 2006 by ISO 80000-3. Its definitions include: Annex A of ISO 31-1 lists units of space and time based on the foot...

other countries. Its use to denote division is not recommended in the ISO 80000-2 standard for mathematical notation. The obelus, a historical glyph consisting...

with ISO 31, and are superseded by ISO/IEC 80000. BIPM – publishes freely available information on SI units SI ISO Standards Handbook: Quantities and...

light and related electromagnetic radiations. It is superseded by ISO 80000-7. ISO 31-6 was initially published in 1980, and amended in 1985. It received...

other parts of the ISO 31 standard. ISO 31-0 was withdrawn on 17 November 2009. It is superseded by ISO 80000-1. Other parts of ISO 31 have also been withdrawn...

notation for the binary logarithm is lb (the notation preferred by ISO 31-11 and ISO 80000-2). Historically, the first application of binary logarithms was...

p. 91. Roger Godement, Algebra, 1968. ISO 80000-2:2009. Ken Stroud, Engineering Mathematics, 2013. ISO 80000-2:2019. Weisstein, Eric W. "Unit Matrix"...