Translations:Units/38/en

According to The International System of Units (SI), the symbols to specify a units are officially approved. Two consequences can be highlighted from this.
 * it is not easy for a computer program to work with unit symbols because some are Greek letters for instance. Hence they can be a bit difficult to process by a program
 * while some units and their symbols can be used widely, they may be not approved officially, like for instance tonne unit (see p55 of Guide for the Use of the International System of Units (SI))