1) Coding theory 2) Data compression
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https://www.crosswordclues.com/clue/prefix-code
A prefix code is a type of code system (typically a variable-length code) distinguished by its possession of the `prefix property`; which states that there is no valid code word in the system that is a prefix (start) of any other valid code word in the set. For example, a code with code words {9, 55} has the prefix property; a code consisting of.....
Found on
http://en.wikipedia.org/wiki/Prefix_code
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