Historically, the most commonly used text code is the IRA or the International Reference Alphabet, in which each character in this code is represented by a unique 7-bit pattern.
Since each character in this code is represented by a 7-bit binary code, there are 128 different characters that can be represented here.
The characters that are encoded with International Reference Alphabet, are always stored and transmitted using 8-bits per character, where the 8th bit is a parity bit mainly used for error detection.
The bits in International Reference Alphabet, are set in such a manner that the total number in each octet is always odd or always even.
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