There are many National Standards, but overall the International Organization for Standardization, based in Geneva, Switzerland has established tens of thousands of standards covering almost every conceivable topic. Most of these are then adopted worldwide replacing all the incompatible 'homegrown' standards. Many of these standards are naturally evolved from those designed in-house within an industry, or by a particular country, whilst others have been built from scratch by groups of experts who sit on various Technical Committees.
See also: List of ISO standards
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