ISO/TC 12 - Quantities and units

This document gives names, symbols, definitions and units for quantities of acoustics. Where appropriate, conversion factors are also given.

This document gives names, symbols and definitions for characteristic numbers used in the description of transport and transfer phenomena.

This document gives names, symbols, definitions and units for quantities of space and time. Where appropriate, conversion factors are also given.

This document gives names, symbols, definitions and units for quantities used for light and optical radiation in the wavelength range of approximately 1 nm to 1 mm. Where appropriate, conversion factors are also given.

This document gives names, symbols, definitions and units for quantities of thermodynamics. Where appropriate, conversion factors are also given.

This document gives names, symbols, definitions and units for quantities used in atomic and nuclear physics. Where appropriate, conversion factors are also given.

This document specifies mathematical symbols, explains their meanings, and gives verbal equivalents and applications. This document is intended mainly for use in the natural sciences and technology, but also applies to other areas where mathematics is used.

This document gives names, symbols, definitions and units for quantities of physical chemistry and molecular physics. Where appropriate, conversion factors are also given.

This document gives names, symbols, definitions and units for quantities of condensed matter physics. Where appropriate, conversion factors are also given.

This document gives names, symbols, definitions and units for quantities of mechanics. Where appropriate, conversion factors are also given.

ISO 80000-1:2009 gives general information and definitions concerning quantities, systems of quantities, units, quantity and unit symbols, and coherent unit systems, especially the International System of Quantities, ISQ, and the International System of Units, SI. The principles laid down in ISO 80000-1:2009 are intended for general use within the various fields of science and technology and as an introduction to other parts of the Quantities and units series. Ordinal quantities and nominal properties are outside the scope of ISO 80000-1:2009.

In IEC 80000-6:2008, names, symbols, and definitions for quantities and units of electromagnetism are given. Where appropriate, conversion factors are also given. International Standard IEC 80000-6 has been prepared by IEC technical committee 25: Quantities and units, and their letter symbols in close cooperation with ISO/TC 12, Quantities, units, symbols, conversion factors. This first edition of IEC 80000-6 cancels and replaces the second edition of ISO 31-5, published in 1992, and its amendment 1 (1998).

ISO 80000-9 gives names, symbols, and definitions for quantities and units of physical chemistry and molecular physics. Where appropriate, conversion factors are also given.

ISO 80000-10:2009 gives the names, symbols, and definitions for quantities and units used in atomic and nuclear physics. Where appropriate, conversion factors are also given.

ISO 80000-2:2009 gives general information about mathematical signs and symbols, their meanings, verbal equivalents and applications. The recommendations in ISO 80000-2:2009 are intended mainly for use in the natural sciences and technology, but also apply to other areas where mathematics is used.

ISO 80000-12:2009 gives names, symbols and definitions for quantities and units of solid state physics. Where appropriate, conversion factors are also given.

ISO 80000-9:2009 gives names, symbols, and definitions for quantities and units of physical chemistry and molecular physics. Where appropriate, conversion factors are also given.

ISO 80000-11:2008 gives the names, symbols and definitions for characteristic numbers used in the description of transport phenomena.

ISO 80000-7:2008 gives names, symbols and definitions for quantities and units for light and other electromagnetic radiation. Where appropriate, conversion factors are also given.

ISO 80000-8:2007 gives names, symbols and definitions for quantities and units of acoustics. Where appropriate, conversion factors are also given.

ISO 80000-5:2007 gives names, symbols and definitions for quantities and units of thermodynamics. Where appropriate, conversion factors are also given.

ISO 80000-4:2006 specifies the names, symbols and definitions for quantities and units of classical mechanics. Where appropriate, conversion factors are also given.

ISO 80000-3:2006 gives names, symbols and definitions for quantities and units of space and time. Where appropriate, conversion factors are also given.

Describes the International System of Units SI, recommends selected decimal multiples and submultiples for general use, gives certain other units which may be used with the SI, and quotes the definitions of the SI base units.

Gives general information about mathematical signs and symbols, their meanings, verbal equivalents, printing, notation of scalars, vectors and tensors and applications.

This document is part 8 of ISO 31, which deals with the quantities and units in the various fields of science and technology.

Gives names and symbols for 70 quantities and units. Where appropriate, conversion factors are also given.

Gives names and symbols for 70 quantities and units. Where appropriate, conversion factors are also given. Annex A describes three-dimensional equations and quantities (Gaussian quantities). Annex B includes examples of relations in different systems of equations.

Describes the International System of Units SI, recommends selected decimal multiples and submultiples for general use, gives certain other units which may be used with the SI, and quotes the definitions of the SI base units.

Gives name, symbol and definition for 51 quantities and units of atomic and nuclear physics. Where appropriate, conversion factors are also given. Annex A includes names of symbols of the chemical elements, Annex B the notation of symbols for chemical elements and nuclides, Annex C the original names and symbols for nuclides of radioactive series, Annex D examples of relations in different systems of equations using different systems of units.

Gives name, symbol and definition for 39 quantities and units of acoustics. Where appropriate, conversion factors are also given.

Gives name, symbol and definition for 62 quantities and units of solid state physics. Where appropriate, conversion factors are also given.

Gives name, symbol and definition for 21 quantities and units of space and time. Where appropriate, conversion factors are also given. Annex A includes units based on the foot, pound and second and some other units, Annex B other non-SI units given for information, especially regarding the conversion factor.

Gives name, symbol and definition for 43 quantities and units of heat. Where appropriate, conversion factors are also given. Annex A includes units in the CGS system with special names, Annex B units based on the foot, pound and second and some other units, Annex C other units given for information, especially regarding the conversion factor.