<P> Originally based on the English alphabet , ASCII encodes 128 specified characters into seven - bit integers as shown by the ASCII chart above . Ninety - five of the encoded characters are printable : these include the digits 0 to 9 , lowercase letters a to z , uppercase letters A to Z , and punctuation symbols . In addition , the original ASCII specification included 33 non-printing control codes which originated with Teletype machines ; most of these are now obsolete . </P>
<P> Originally based on the English alphabet , ASCII encodes 128 specified characters into seven - bit integers as shown by the ASCII chart above . Ninety - five of the encoded characters are printable : these include the digits 0 to 9 , lowercase letters a to z , uppercase letters A to Z , and punctuation symbols . In addition , the original ASCII specification included 33 non-printing control codes which originated with Teletype machines ; most of these are now obsolete . </P>
is an encoding for english alphanumeric characters as 7-bit numbers
is an encoding for english alphanumeric characters as 7-bit numbers
ASCII
ASCII