Each element, a through m, was originally intended to be a single decimal digit. As inventories grew in complexity, element g became [[https://en.wikipedia.org/wiki/Alphanumeric/ alphanumeric]], beginning with capital A for certain newly added items. By 2000, uppercase C was in use.
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Each element, a through m, was originally intended to be a single decimal digit. As inventories grew in complexity, element g became [https://en.wikipedia.org/wiki/Alphanumeric/ alphanumeric], beginning with capital A for certain newly added items. By 2000, uppercase C was in use.