This policy is an exception to the following:
In some Modelica tools you can add custom unit conversions. For Wolfram SystemModeler visit Model Center - Variable Views.
Wikipedia: 'Originally, the only symbol for the litre was l (lowercase letter L), following the SI convention that only those unit symbols that abbreviate the name of a person start with a capital letter. In many English-speaking countries, however, the most common shape of a handwritten Arabic digit 1 is just a vertical stroke; that is, it lacks the upstroke added in many other cultures. Therefore, the digit "1" may easily be confused with the letter "l". In some computer typefaces, the two characters are barely distinguishable. As a result, L (uppercase letter L) was adopted by the CIPM as an alternative symbol for litre in 1979.'
Dr Darren remarks:
Who knew that Australia ever followed the USA in any matter involving units? In this case I agree, the "L" is much clearer visually:
Wikipedia: 'The United States National Institute of Standards and Technology now recommends the use of the uppercase letter L, a practice that is also widely followed in Canada and Australia. In these countries, the symbol L is also used with prefixes, as in mL and μL, instead of the traditional ml and μl used in Europe.'
In some Modelica tools you can add custom unit conversions. For Wolfram SystemModeler visit Model Center - Variable Views.