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ISO/IEC 80000

ISO/IEC 80000

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International standard
International standard
International standards are standards developed by international standards organizations. International standards are available for consideration and use, worldwide...

 ISO 80000 or IEC 80000—depending on which of the two international standards bodies International Organization for Standardization
International Organization for Standardization
The International Organization for Standardization , widely known as ISO, is an international standard-setting body composed of representatives from various national standards organizations. Founded on February 23, 1947, the organization promulgates worldwide proprietary, industrial and commercial...

 and International Electrotechnical Commission
International Electrotechnical Commission
The International Electrotechnical Commission is a non-profit, non-governmental international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as "electrotechnology"...

 is in charge of each respective part—is a style guide for the use of physical quantities and units of measurement
Measurement
Measurement is the process or the result of determining the ratio of a physical quantity, such as a length, time, temperature etc., to a unit of measurement, such as the metre, second or degree Celsius...

, and formulas involving them, in scientific and educational documents worldwide. In most countries, the notations used in mathematics and science textbooks at schools and universities follow closely the guidelines given by this standard.

The ISO/IEC 80000 family of standards was completed with the publication of Part 1 in November 2009. The introduction to Part 1 states 'The system of quantities, including the relations among them the quantities used as the basis of the units of the SI
Si
Si, si, or SI may refer to :- Measurement, mathematics and science :* International System of Units , the modern international standard version of the metric system...

, is named the International System of Quantities, denoted “ISQ”, in all languages.'

Parts


The Standard has 14 parts:
part name former source notes
ISO 80000-1 General ISO 31-0
ISO 31-0
ISO 31-0 is the introductory part of international standard ISO 31 on quantities and units. It provides guidelines for using physical quantities, quantity and unit symbols, and coherent unit systems, especially the SI...

, IEC 60027-1 and IEC 60027-3
ISO 80000-2 Mathematical signs and symbols to be used in the natural sciences and technology ISO 31-11
ISO 31-11
ISO 31-11 was the part of international standard ISO 31 that defines mathematical signs and symbols for use in physical sciences and technology...

, IEC 60027-1
ISO 80000-3 Space and time ISO 31-1
ISO 31-1
ISO 31-1 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to space and time.Its definitions include:Annex A of ISO 31-1 lists units of space and time based on the foot, pound and second...

 and ISO 31-2
ISO 31-2
ISO 31-2 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to periodic and related phenomena.Its definitions include:...

ISO 80000-4 Mechanics ISO 31-3
ISO 31-3
ISO 31-3 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to mechanics.Its definitions include:...

ISO 80000-5 Thermodynamics ISO 31-4
ISO 31-4
ISO 31-4 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to heat.Its definitions include:...

IEC 80000-6 Electromagnetism ISO 31-5
ISO 31-5
ISO 31-5 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to electricity and magnetism.Some of its definitions are below, with values taken from :...

, IEC 60027-1
ISO 80000-7 Light ISO 31-6
ISO 31-6
ISO 31-6 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to light and related electromagnetic radiations.Its definitions include:...

ISO 80000-8 Acoustics ISO 31-7
ISO 31-7
ISO 31-7 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to acoustics.Its definitions include:...

ISO 80000-9 Physical chemistry and molecular physics ISO 31-8
ISO 31-8
ISO 31-8 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to physical chemistry and molecular physics.-Quantities and units:-Notes:...

Atomic and nuclear physics ISO 31-9
ISO 31-9
ISO 31-9 gives name, symbol and definition for 51 quantities and units of atomic and nuclear physics. Where appropriate, conversion factors are also given...

 and ISO 31-10
ISO 31-10
ISO 31-10 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to nuclear reactions and ionizing radiations. It gives names and symbols for 70 quantities and units. Where appropriate, conversion factors are also given.Its definitions include:...

ISO 80000-11 Characteristic numbers ISO 31-12
ISO 31-12
ISO 31-12 gives name, symbol and definition for 25 selected characteristic numbers used for the description of transport phenomena.*http://www.iso.org/iso/catalogue_detail.htm?csnumber=3655...

ISO 80000-12 Solid state physics ISO 31-13
ISO 31-13
ISO 31-13 gives name, symbol and definition for 62 quantities and units of solid state physics. Where appropriate, conversion factors are also given....

Information science and technology subclauses 3.8 and 3.9 of IEC 60027-2:2005 and IEC 60027-3
IEC 80000-14 Telebiometrics related to human physiology IEC 60027-7

IEC TC 25


Anders J. Thor, the chairman of IEC TC 25
IEC TC 25
IEC Technical Committee 25 was established in 1935. It is one of the technical committees of the International Electrotechnical Commission ....

, has said that there are four systems of writing that bridge all linguistic barriers regardless of the alphabet used. These systems are:
  • the set of mathematical signs and symbols
  • the SI
  • the symbols for chemical elements
  • the way of writing notes for music


The first three systems will be given in ISO/IEC 80000.

Binary prefixes



A 1999 addendum to IEC 60027-2
IEC 60027
IEC 60027 is the International Electrotechnical Commission's standard on Letter symbols to be used in electrical technology...

 on binary prefixes has resulted in some public interest in the standard and is still being widely discussed in the computer community, as it attempts to finally settle the confusion about whether, e.g., a kilobit
Kilobit
The kilobit is a multiple of the unit bit for digital information or computer storage. The prefix kilo is defined in the International System of Units as a multiplier of 103 , and therefore,...

 corresponds to 1000 bits or 1024 bits.

The harmonized IEC 80000-13:2008 standard cancels and replaces subclauses 3.8 and 3.9 of IEC 60027-2:2005 (those defining Prefixes for binary multiples). The only significant change is the addition of explicit definitions for some quantities.

See also

  • International Vocabulary of Metrology
    International vocabulary of metrology
    The International vocabulary of metrology is an attempt to find a common language and terminology in metrology, e.g. the science of measurements, across different fields of science, legislature and commerce...

  • International System of Units
    Si
    Si, si, or SI may refer to :- Measurement, mathematics and science :* International System of Units , the modern international standard version of the metric system...

  • BIPM — publishes freely available information on SI units
  • NIST — official U.S. representative for SI; publishes freely available guide to use of SI

External links