is a computer architecture created by Donald Knuth. page 
Knuth is writing a grand monography The Art of Computer Programming, and in older editions of that book, he used to present example subroutines and programs in this architecture.
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Practical Algorithm To Retrieve Information Coded In Alphanumeric’s basic idea is to build a binary Trie, but to avoid one-way branching by including in each node the number of bits to skip over before making the next test.