This document 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).
The principles laid down in this document are intended for general use within the various fields of science and technology, and as an introduction to other parts of this International Standard.
The ISO/IEC 80000 series does not, as yet, cover ordinal quantities and nominal properties.

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

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

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

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

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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.

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

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

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

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

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2018-10-09: WI abandoned to follow cancellation of corresponding WI in ISO (ISO notification to dataservice on 2018-10-09).

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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.

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

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

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

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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.

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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.

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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.

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

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

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