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Claude Émile Jean-Baptiste Litre
fictional character created in 1978 by Kenneth Woolner of the University of Waterloo to justify the use of a capital L to denote litres. The International System of Units usually only permits the use of a capital letter when a unit is named after a person.[1] The lower-case character l might be difficult to distinguish from the upper-case character I or the digit 1 in certain fonts and styles, and therefore both the lower-case (l) and the upper-case (L) are allowed as the symbol for litre.
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