This is a classic example of Hexspeak, like leetspeak, is a novelty form of variant English spelling.
Hexspeak was created by programmers who wanted a magic number, a clear and unique identifier with which to mark memory or data. Using hexadecimal notation, which includes the digits 0123456789ABCDEF, it is possible to create small words with the digit "0" representing the letter "O", "1"...
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