Alphanumeric characters include both upper and lower case letters (A to Z, a to z) and numerals (0 to 9). Beyond these, special characters — such as punctuation marks and symbols — add further depth ...
THE notion of assigning specific number values to letters dates back as least as far as 700 BC. According to an inscription from his reign, Sargon II, an Assyrian king, built a perimeter wall around ...
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