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# International System of Units/Related Articles

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A list of Citizendium articles, and planned articles, about International System of Units.
See also changes related to International System of Units, or pages that link to International System of Units or to this page or whose text contains "International System of Units".

## Subtopics

• Chemical engineering [r]: The field of engineering that deals with industrial and natural processes involving the chemical, physical or biological transformation of matter or energy into forms useful for mankind, economically and safely without compromising the environment [e]
• Chemistry [r]: The science of matter, or of the electrical or electrostatical interactions of matter. [e]
• Engineering [r]: The profession in which a knowledge of the mathematical and natural sciences gained by study, experience and practice is applied with judgment to develop ways to economically use the materials and forces of nature for the benefit of mankind. [e]
• International Bureau of Weights and Measures [r]: An international standards organization (commonly referred to as the BIPM) established to maintain the International System of Units (SI). [e]
• Systems of measurement [r]: A set of units which can be used to specify anything which can be measured and were historically important, regulated and defined because of trade and internal commerce. [e]

## Related topics

• Speed of light [r]: A physical constant c describing the speed of electromagnetic radiation in vacuum. In the International System of Units the metre is the distance light travels in classical vacuum in 1/c seconds, using the defined value c = c0299  792  458 m/s (exact). [e]
• Special relativity [r]: Theory of the effects of motion on observations of things such as length, time, mass and energy. The theory is based on the postulates that all laws of physics are the same in all inertial reference systems, and that the vacuum speed of light is a universal constant, independent of the speed of the source. [e]
• Free space (electromagnetism) [r]: In classical electromagnetism, the vacuum reference state with no fields or particles; in quantum mechanics, the vacuum state with electromagnetic fields fluctuating about an average value of zero. [e]