# ISO/IEC 80000

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International standard on physical quantities and units of measurement

**ISO/IEC 80000**, ***Quantities and units***, is an [international standard](/source/International_standard) describing the [International System of Quantities](/source/International_System_of_Quantities) (ISQ). It was developed and promulgated jointly by the [International Organization for Standardization](/source/International_Organization_for_Standardization) (ISO) and the [International Electrotechnical Commission](/source/International_Electrotechnical_Commission) (IEC). It serves as a style guide for using [physical quantities](/source/Physical_quantities) and [units of measurement](/source/Unit_of_measurement), formulas involving them, and their corresponding units, in scientific and educational documents for worldwide use. The ISO/IEC 80000 family of standards was completed with the publication of the first edition of Part 1 in November 2009.[1][2]

## Overview

By 2021, ISO/IEC 80000 comprised 13 parts, two of which (parts 6 and 13) were developed by IEC and the remaining 11 were developed by ISO, with a further three parts (15, 16 and, 17) under development. Part 14 was withdrawn.

Part Year Name Replaces Status ISO 80000-1[3] 2022 General ISO 31-0, IEC 60027-1, and IEC 60027-3 published ISO 80000-2[4] 2019 Mathematics ISO 31-11 and IEC 60027-1 published ISO 80000-3[5] 2019 Space and time ISO 31-1 and ISO 31-2 published ISO 80000-4[6] 2019 Mechanics ISO 31-3 published ISO 80000-5[7] 2019 Thermo­dynamics ISO 31-4 published IEC 80000-6[8] 2022 Electro­magnetism ISO 31-5 published ISO 80000-7[9] 2019 Light and radiation ISO 31-6 published ISO 80000-8[10] 2020 Acoustics ISO 31-7 published ISO 80000-9[11] 2019 Physical chemistry and molecular physics ISO 31-8 published ISO 80000-10[12] 2019 Atomic and nuclear physics ISO 31-9 and ISO 31-10 published ISO 80000-11[13] 2019 Characteristic numbers ISO 31-12 published ISO 80000-12[14] 2019 Condensed matter physics ISO 31-13 published IEC 80000-13[15] 2025 Information science and technology sub­clauses 3.8 and 3.9 of IEC 60027-2:2005 published IEC 80000-14[16] 2008 Telebiometrics related to human physiology IEC 60027-7 withdrawn IEC 80000-15[17] Logarithmic and related quantities under develop­ment IEC 80000-16[18] Printing and writing rules under develop­ment IEC 80000-17[19] Time dependency under develop­ment

## Subject areas

By 2021 the 80000 standard had 13 published parts. A description of each part is available online, with the complete parts for sale.[20][21]

### Part 1: General

ISO 80000-1:2022 revised ISO 80000-1:2009, which replaced ISO 31-0:1992 and ISO 1000:1992.[22] 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).[3] The descriptive text of this part is available online.[23][24]

According to the standard, symbols for quantities are "generally single letters from the Latin or Greek alphabet" and are "written in italic (sloping) type". Examples include

- density of heat flow rate: *q* = *Φ* / *A*

- electric current density: *J* = *I* / *A*

- magnetic flux density: *B* = *Φ* / *A*

### Part 2: Mathematics

ISO 80000-2:2019 revised ISO 80000-2:2009,[4] which superseded [ISO 31-11](/source/ISO_31-11).[25] It specifies mathematical symbols, explains their meanings, and gives verbal equivalents and applications. The descriptive text of this part is available online.[26]

### Part 3: Space and time

ISO 80000-3:2019 revised ISO 80000-3:2006,[5] which supersedes [ISO 31-1](/source/ISO_31-1) and [ISO 31-2](/source/ISO_31-2).[27] It gives names, symbols, definitions and units for quantities of space and time. The descriptive text of this part is available online.[28]

A definition of the [decibel](/source/Decibel), included in the original 2006 publication, was omitted in the 2019 revision, leaving ISO/IEC 80000 without a definition of this unit; a new part of the standard, IEC 80000-15 (Logarithmic and related quantities), is under development.

### Part 4: Mechanics

ISO 80000-4:2019 revised ISO 80000-4:2006,[6] which superseded [ISO 31-3](/source/ISO_31-3).[29] It gives names, symbols, definitions and units for quantities of mechanics. The descriptive text of this part is available online.[30]

### Part 5: Thermodynamics

ISO 80000-5:2019 revised ISO 80000-5:2007,[7] which superseded [ISO 31-4](/source/ISO_31-4).[31] It gives names, symbols, definitions and units for quantities of [thermodynamics](/source/Thermodynamics). The descriptive text of this part is available online.[32]

### Part 6: Electromagnetism

IEC 80000-6:2022 revised IEC 80000-6:2008,[8] which superseded [ISO 31-5](/source/ISO_31-5)[33] as well as IEC 60027-1. It gives names, symbols, and definitions for quantities and units of [electromagnetism](/source/Electromagnetism). The descriptive text of this part is available online.[34]

### Part 7: Light and radiation

ISO 80000-7:2019 revised ISO 80000-7:2008,[9] which superseded [ISO 31-6](/source/ISO_31-6).[35] It gives names, symbols, definitions and units for quantities used for [light](/source/Light) and [optical radiation](/source/Optical_radiation) in the [wavelength](/source/Wavelength) range of approximately 1 nm to 1 mm. The descriptive text of this part is available online.[36]

### Part 8: Acoustics

ISO 80000-8:2020 revised ISO 80000-8:2007,[37] which revised ISO 31-7:1992.[38] It gives names, symbols, definitions, and units for quantities of [acoustics](/source/Acoustics). The descriptive text of this part is available online.[39]

It has a foreword, scope introduction, scope, normative references (of which there are none), as well as terms, and definitions. It includes definitions of [sound pressure](/source/Sound_pressure), [sound power](/source/Sound_power), and [sound exposure](/source/Sound_exposure), and their corresponding [levels](/source/Level_(logarithmic_quantity)): [sound pressure level](/source/Sound_pressure_level), [sound power level](/source/Sound_power_level), and [sound exposure level](/source/Sound_exposure_level). It includes definitions of the following quantities:

- logarithmic frequency range

- [static pressure](/source/Static_pressure)

- [sound pressure](/source/Sound_pressure)

- [sound particle displacement](/source/Particle_displacement)

- [sound particle velocity](/source/Particle_velocity)

- [sound particle acceleration](/source/Particle_acceleration)

- [volume flow rate](/source/Volumetric_flow_rate), [volume velocity](/source/Volume_velocity)

- [sound energy density](/source/Sound_energy_density)

- [sound energy](/source/Sound_energy)

- [sound power](/source/Sound_power)

- [sound intensity](/source/Sound_intensity)

- [sound exposure](/source/Sound_exposure)

- characteristic impedance for [longitudinal waves](/source/Longitudinal_wave)

- [acoustic impedance](/source/Acoustic_impedance)

- [sound pressure level](/source/Sound_pressure_level)

- [sound power level](/source/Sound_power_level)

- [sound exposure level](/source/Sound_exposure_level)

- [reverberation time](/source/Reverberation_time)

### Part 13: Information science and technology

Further information: [Units of information](/source/Units_of_information) and [Quantities of information](/source/Quantities_of_information)

IEC 80000-13:2025 revised IEC 80000-13:2008, which replaced subclauses 3.8 and 3.9 of IEC 60027-2:2005 and [IEC 60027-3](/source/IEC_60027-3).[15] It defines quantities and units used in [information science](/source/Information_science) and [information technology](/source/Information_technology), and specifies names and symbols for these quantities and units. It has a scope; normative references; names, definitions, and symbols; and prefixes for [binary](/source/Binary_number) multiples.

Quantities defined in this standard are:

- [traffic intensity](/source/Traffic_intensity), *A*: "number of simultaneously busy resources in a particular pool of resources"

- traffic offered intensity, *A*0: "traffic intensity ... of the traffic that would have been generated by the users of a pool of resources if their use had not been limited by the size of the pool"

- traffic carried intensity, *Y*: "traffic intensity ... of the traffic served by a particular pool of resources"

- mean queue length, *L* (or *Ω*): time average of queue length

- loss probability, *B*: "probability for losing a call attempt"

- waiting probability, *W*: "probability for waiting for a resource"

- call intensity, calling rate, *λ*: "number of call attempts over a specified time interval divided by the duration of this interval"

- completed call intensity, *μ*: "call intensity ... for the call attempts that result in the transmission of an answer [signal](/source/Signal)"

- [storage capacity](/source/Computer_data_storage), storage size, *M*

- equivalent binary storage capacity, *M*e

- transfer rate, *r* (or *ν*)

- period of data elements, *T*

- [binary digit](/source/Bit) rate, bit rate, *r*b, *r*bit (*ν*b, *ν*bit)

- period of [binary digits](/source/Bit), bit period, *T*b, *T*bit

- equivalent binary digit rate, equivalent bit rate, *r*e (or *ν*e)

- [modulation rate](/source/Modulation_rate), line digit rate, *r*m, *u*

- quantizing distortion power, *T*Q

- carrier power, *P*c, *C*

- signal energy per binary digit, *E*b, *E*bit

- error probability, *P*

- [Hamming distance](/source/Hamming_distance), *d*n

- [clock frequency](/source/Clock_rate), clock rate, *f*cl

- decision content, *D*a

- [information content](/source/Information_content), *I*(*x*)

- [entropy](/source/Entropy_(information_theory)), *H*

- [maximum entropy](/source/Maximum_Entropy), *H*0 (or *H*max)

- [relative entropy](/source/Relative_entropy), *H*r

- [redundancy](/source/Redundancy_theory_of_truth), *R*

- relative redundancy, *r*

- joint information content, *I*(*x*, *y*)

- conditional information content, *I*(*x*|*y*)

- [conditional entropy](/source/Conditional_entropy), mean conditional information content, average conditional information content, *H*(*X*|*Y*)

- [equivocation](/source/Equivocation_(information_theory)), *H*(*X*|*Y*)

- [irrelevance](/source/Relevance), *C*

- transinformation content, *T*(*x*, *y*)

- mean transinformation content, *T*

- character mean entropy, *H*′

- [average information rate](/source/Information_rate), *H**

- character mean transinformation content, *T*′

- average transinformation rate, *T**

- channel capacity per character; [channel capacity](/source/Channel_capacity), *C*′

- channel time capacity; channel capacity, *C**

The standard also includes definitions for units relating to information technology, such as the [erlang](/source/Erlang_(unit)) (E), [bit](/source/Bit) (bit), [octet](/source/Octet_(unit)) (o), [byte](/source/Byte) (B), [baud](/source/Baud) (Bd), [shannon](/source/Shannon_(unit)) (Sh), [hartley](/source/Hartley_(unit)) (Hart), and the [natural unit of information](/source/Nat_(unit)) (nat).

Clause 4 of the standard defines standard [binary prefixes](/source/Binary_prefix) used to denote powers of 1024 as 10241 (kibi-), 10242 (mebi-), 10243 (gibi-), 10244 (tebi-), 10245 (pebi-), 10246 (exbi-), 10247 (zebi-), 10248 (yobi-), 10249 (robi-), and 102410 (quebi-).

## International System of Quantities

Main article: [International System of Quantities](/source/International_System_of_Quantities)

Part 1 of ISO 80000 introduces the International System of Quantities and describes its relationship with the [International System of Units](/source/International_System_of_Units) (SI). Specifically, its introduction states "The system of quantities, including the relations among the quantities used as the basis of the units of the SI, is named the *International System of Quantities*, denoted 'ISQ', in all languages." It further clarifies that "ISQ is simply a convenient notation to assign to the essentially infinite and continually evolving and expanding system of quantities and equations on which all of modern science and technology rests. ISQ is a shorthand notation for the 'system of quantities on which the SI is based'."

## Units of the ISO and IEC 80000 series

The standard includes all SI units but is not limited to only SI units. Units that form part of the standard but not the SI include the units of information storage ([bit](/source/Bit) and [byte](/source/Byte)), units of [entropy](/source/Entropy_(information_theory)) ([shannon](/source/Shannon_(unit)), [natural unit of information](/source/Nat_(unit)) and [hartley](/source/Hartley_(unit))), and the [erlang](/source/Erlang_(unit)) (a unit of traffic intensity).

## See also

- [International Vocabulary of Metrology](/source/International_vocabulary_of_metrology)

- [International System of Units](/source/SI)

- [BIPM](/source/BIPM) – publishes freely available information on SI units

- [NIST](/source/NIST) – official U.S. representative for SI; publishes freely available guide to use of SI

## References

1. **[^](#cite_ref-1)** [Standards Catalogue TC/12 Quantities and Units](http://www.iso.org/iso/home/store/catalogue_tc/catalogue_tc_browse.htm?commid=46202)

1. **[^](#cite_ref-2)** Schirn, Alexandra (9 January 2023). ["ISO 80000-1:2022- Quantities And Units – ANSI Blog"](https://blog.ansi.org/iso-80000-1-2022-quantities-and-units/). *The ANSI Blog*. Retrieved 16 May 2023.

1. ^ [***a***](#cite_ref-80000-1:2022_3-0) [***b***](#cite_ref-80000-1:2022_3-1) ["ISO 80000-1:2022 Quantities and units — Part 1: General"](https://www.iso.org/standard/76921.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 2 November 2023.

1. ^ [***a***](#cite_ref-80000-2:2019_4-0) [***b***](#cite_ref-80000-2:2019_4-1) ["ISO 80000-2:2019 Quantities and units — Part 2: Mathematics"](https://www.iso.org/standard/64973.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 15 September 2019.

1. ^ [***a***](#cite_ref-80000-3:2019_5-0) [***b***](#cite_ref-80000-3:2019_5-1) ["ISO 80000-3:2019 Quantities and units — Part 3: Space and time"](https://www.iso.org/standard/64974.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 23 October 2019.

1. ^ [***a***](#cite_ref-80000-4:2019_6-0) [***b***](#cite_ref-80000-4:2019_6-1) ["ISO 80000-4:2019 Quantities and units — Part 4: Mechanics"](https://www.iso.org/standard/64975.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 15 September 2019.

1. ^ [***a***](#cite_ref-80000-5:2019_7-0) [***b***](#cite_ref-80000-5:2019_7-1) ["ISO 80000-5:2019 Quantities and units — Part 5: Thermodynamics"](https://www.iso.org/standard/64976.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 15 September 2019.

1. ^ [***a***](#cite_ref-80000-6:2022_8-0) [***b***](#cite_ref-80000-6:2022_8-1) ["IEC 80000-6:2022 Quantities and units — Part 6: Electromagnetism"](https://www.iso.org/standard/77846.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 20 November 2022.

1. ^ [***a***](#cite_ref-80000-7:2019_9-0) [***b***](#cite_ref-80000-7:2019_9-1) ["ISO 80000-7:2019 Quantities and units — Part 4: Light and radiation"](https://www.iso.org/standard/64977.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 23 October 2019.

1. **[^](#cite_ref-10)** ["ISO 80000-8:2020 Quantities and units — Part 8: Acoustics"](https://www.iso.org/standard/64978.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 20 March 2020.

1. **[^](#cite_ref-11)** ["ISO 80000-9:2019 Quantities and units — Part 9: Physical chemistry and molecular physics"](https://www.iso.org/standard/64979.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 15 September 2019.

1. **[^](#cite_ref-12)** ["ISO 80000-10:2019 Quantities and units — Part 10: Atomic and nuclear physics"](https://www.iso.org/standard/64980.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 15 September 2019.

1. **[^](#cite_ref-13)** ["ISO 80000-11:2019 Quantities and units — Part 11: Characteristic numbers"](https://www.iso.org/standard/64982.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 11 February 2020.

1. **[^](#cite_ref-14)** ["ISO 80000-12:2019 Quantities and units — Part 12: Condensed matter physics"](https://www.iso.org/standard/63480.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 15 September 2019.

1. ^ [***a***](#cite_ref-80000-13:2025_15-0) [***b***](#cite_ref-80000-13:2025_15-1) ["IEC 80000-13:2025 Quantities and units — Part 13: Information science and technology"](https://www.iso.org/standard/87648.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 21 February 2025.

1. **[^](#cite_ref-16)** ["IEC 80000-14:2008 Quantities and units — Part 14: Telebiometrics related to human physiology"](https://www.iso.org/standard/43012.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 15 September 2019.

1. **[^](#cite_ref-17)** ["IEC/CD 80000-15 Quantities and units — Part 15: Logarithmic and related quantities"](https://www.iso.org/standard/76692.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 24 April 2022.

1. **[^](#cite_ref-18)** ["IEC/CD 80000-16: Quantities and units — Part 16: Printing and writing rules"](https://www.iso.org/standard/76693.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 1 May 2021.

1. **[^](#cite_ref-19)** ["IEC/CD 80000-17 Quantities and units — Part 17: Time dependency"](https://www.iso.org/standard/76694.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 1 May 2021.

1. **[^](#cite_ref-20)** ["International standards for quantities and units are under revision"](https://web.archive.org/web/20191204173934/https://www.ee.co.za/article/international-standards-quantities-units-revision.html). *EE Publishers*. 31 January 2017. Archived from [the original](https://www.ee.co.za/article/international-standards-quantities-units-revision.html) on 4 December 2019. Retrieved 4 December 2019.

1. **[^](#cite_ref-21)** ["Standards by ISO/TC 12 – Quantities and units"](https://www.iso.org/committee/46202/x/catalogue/p/1/u/1/w/0/d/0). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 24 April 2020.

1. **[^](#cite_ref-80000-1:2009_22-0)** ["ISO 80000-1:2009 Quantities and units – Part 1: General"](https://www.iso.org/standard/30669.html#lifecycle). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 2 November 2023.

1. **[^](#cite_ref-80000-1:2022(en)_23-0)** ["ISO 80000-1:2022(en) Quantities and units – Part 1: General"](https://www.iso.org/obp/ui/en/#iso:std:iso:80000:-1:ed-2:v1:en). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 2 November 2023.

1. **[^](#cite_ref-80000-1:2009(en)_24-0)** ["ISO 80000-1:2009(en) Quantities and units – Part 1: General"](https://www.iso.org/obp/ui/#iso:std:iso:80000:-1:ed-1:v1:en). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 2 November 2023.

1. **[^](#cite_ref-25)** ["ISO 80000-2:2009"](https://www.iso.org/standard/31887.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 15 September 2019.

1. **[^](#cite_ref-26)** ["ISO 80000-2:2019(en) Quantities and units – Part 2: Mathematics"](https://www.iso.org/obp/ui/#iso:std:iso:80000:-2:ed-2:v2:en). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 23 October 2019.

1. **[^](#cite_ref-27)** ["ISO 80000-3:2006"](http://www.iso.org/iso/catalogue_detail?csnumber=31888). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 20 July 2013.

1. **[^](#cite_ref-28)** ["ISO 80000-3:2019(en) Quantities and units – Part 3: Space and time"](https://www.iso.org/obp/ui/#iso:std:iso:80000:-3:ed-2:v1:en). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 23 October 2019.

1. **[^](#cite_ref-29)** ["ISO 80000-4:2006"](https://www.iso.org/standard/31889.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 15 September 2019.

1. **[^](#cite_ref-30)** ["ISO 80000-4:2019 Quantities and units – Part 4: Mechanics"](https://www.iso.org/obp/ui/#iso:std:iso:80000:-4:ed-2:v1:en). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 23 October 2019.

1. **[^](#cite_ref-31)** ["ISO 80000-5:2007"](https://www.iso.org/standard/31890.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 15 September 2019.

1. **[^](#cite_ref-32)** ["ISO 80000-5:2019(en) Quantities and units – Part 5: Thermodynamics"](https://www.iso.org/obp/ui/#iso:std:iso:80000:-5:ed-2:v1:en). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 23 October 2019.

1. **[^](#cite_ref-80000-6:2008_33-0)** ["IEC 80000-6:2008"](https://www.iso.org/standard/31891.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 20 November 2022.

1. **[^](#cite_ref-34)** ["ISO 80000-6:2022(en,fr) Quantities and units – Part 6: Electromagnetism"](https://www.iso.org/obp/ui/#iso:std:iec:80000:-6:ed-2:v1:en,fr). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 21 November 2022.

1. **[^](#cite_ref-35)** ["ISO 80000-7:2008"](https://www.iso.org/standard/31892.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 15 September 2019.

1. **[^](#cite_ref-36)** ["ISO 80000-7:2019(en) Quantities and units – Quantities and units – Part 7: Light and radiation"](https://www.iso.org/obp/ui/#iso:std:iso:80000:-7:ed-2:v1:en). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 25 March 2021.

1. **[^](#cite_ref-37)** ["ISO 80000-8:2007"](https://www.iso.org/standard/40669.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 23 April 2020.

1. **[^](#cite_ref-38)** ["ISO 31-7:1992"](https://www.iso.org/standard/3641.html). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 23 April 2020.

1. **[^](#cite_ref-39)** ["ISO 80000-8:2020(en) Quantities and units – Part 8: Acoustics"](https://www.iso.org/obp/ui/#iso:std:iso:80000:-8:ed-2:v1:en). [International Organization for Standardization](/source/International_Organization_for_Standardization). Retrieved 23 April 2020.

## External links

- [BIPM SI Brochure](https://www.bipm.org/en/publications/si-brochure)

- [ISO TC12 standards](http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_tc_browse.htm?commid=46202) – Quantities, units, symbols, conversion factors

- [NIST Special Publication 330](http://physics.nist.gov/Pubs/SP330/contents.html) – The International System of Units

- [NIST Special Publication 811](http://physics.nist.gov/Pubs/SP811/contents.html) – Guide for the Use of the International System of Units

v t e International Organization for Standardization (ISO) standards List of ISO standards – ISO romanizations – IEC standards 1–9999 1 2 3 4 6 7 9 16 17 31 -0 -1 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 68-1 128 216 217 226 228 233 259 261 262 302 306 361 500 518 519 639 -1 -2 -3 -5 -6 646 657 668 690 704 732 764 838 843 860 898 965 999 1000 1004 1007 1073-1 1073-2 1155 1413 1538 1629 1745 1989 2014 2015 2022 2033 2047 2108 2145 2146 2240 2281 2533 2709 2711 2720 2788 2848 2852 2921 3029 3103 3166 -1 -2 -3 3297 3307 3601 3602 3864 3901 3950 3977 4031 4157 4165 4217 4909 5218 5426 5427 5428 5725 5775 5776 5800 5807 5964 6166 6344 6346 6373 6385 6425 6429 6438 6523 6709 6943 7001 7002 7010 7027 7064 7098 7185 7200 7498 -1 7637 7736 7810 7811 7812 7813 7816 7942 8000 8093 8178 8217 8373 8501-1 8571 8583 8601 8613 8632 8651 8652 8691 8805/8806 8807 8820-5 8859 -1 -2 -3 -4 -5 -6 -7 -8 -8-I -9 -10 -11 -12 -13 -14 -15 -16 8879 9000/9001 9036 9075 9126 9141 9227 9241 9293 9314 9362 9407 9496 9506 9529 9564 9592/9593 9594 9660 9797-1 9897 9899 9945 9984 9985 9995 10000–19999 10006 10007 10116 10118-3 10160 10161 10165 10179 10206 10218 10279 10303 -11 -21 -22 -28 -238 10383 10585 10589 10628 10646 10664 10746 10861 10957 10962 10967 11073 11170 11172 11179 11404 11544 11783 11784 11785 11801 11889 11898 11940 (-2) 11941 11941 (TR) 11992 12006 12052 12182 12207 12234-2 12620 13211 -1 -2 13216 13250 13399 13406-2 13450 13485 13490 13567 13568 13584 13616 13816 13818 14000 14031 14224 14289 14396 14443 14496 -2 -3 -6 -10 -11 -12 -14 -17 -20 14617 14644 14649 14651 14698 14764 14882 14971 15022 15118 15189 15288 15291 15398 15408 15444 -3 -9 15445 15438 15504 15511 15686 15693 15706 -2 15707 15897 15919 15924 15926 15926 WIP 15930 15938 16023 16262 16355-1 16485 16612-2 16750 16949 (TS) 17024 17025 17100 17203 17369 17442 17506 17799 18004 18014 18181 18245 18629 18760 18916 19005 19011 19092 -1 -2 19114 19115 19125 19136 19407 19439 19500 19501 19502 19503 19505 19506 19507 19508 19509 19510 19600 19650 19752 19757 19770 19775-1 19794-5 19831 20000–29999 20000 20022 20121 20400 20802 20830 21000 21001 21047 21122 21500 21778 21827 22000 22275 22300 22301 22395 22537 23000 23003 23008 23009 23090-3 23092 23094-1 23094-2 23270 23271 23360 23941 24517 24613 24617 24707 24728 25178 25964 26000 26262 26300 26324 27000 series 27000 27001 27002 27005 27006 27729 28000 29110 29148 29199-2 29500 30000+ 30170 31000 32000 37001 38500 39075 40230 40240 40250 40260 40314 40500 42010 45001 50001 55000 56000 80000 Category

v t e IEC standards IEC 60027 60034 60038 60062 60063 60068 60079 60112 60228 60269 60297 60309 60320 60364 60446 60559 60601 60870 60870-5 60870-6 60906-1 60908 60929 60958 60980-344 61030 61131 61131-3 61131-9 61158 61162 61334 61355 61360 61400 61499 61508 61511 61784 61850 61851 61883 61960 61968 61970 62014-4 62026 62056 62061 62196 62262 62264 62304 62325 62351 62365 62366 62379 62386 62455 62680 62682 62700 63110 63119 63382 ISO/IEC 646 1989 2022 4909 5218 6429 6523 7810 7811 7812 7813 7816 7942 8613 8632 8652 8859 9126 9293 9496 9529 9592 9593 9899 9945 9995 10021 10116 10165 10179 10279 10646 10967 11172 11179 11404 11544 11801 12207 13250 13346 13522-5 13568 13816 13818 14443 14496 14651 14882 15288 15291 15408 15444 15445 15504 15511 15693 15897 15938 16262 16485 17024 17025 18004 18014 18181 19752 19757 19770 19788 20000 20802 21000 21827 22275 22537 23000 23003 23008 23270 23360 24707 24727 24744 24752 26300 27000 27000 family 27002 27040 29110 29119 33001 38500 39075 42010 80000 81346 Related International Electrotechnical Commission

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Adapted from the Wikipedia article [ISO/IEC 80000](https://en.wikipedia.org/wiki/ISO%2FIEC_80000) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/ISO%2FIEC_80000?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.