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Soundex

n.

phonetic coding system, 1959, from sound (n.1) + brand-name suffix -ex.

Online Etymology Dictionary, © 2010 Douglas Harper
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soundex in Technology

algorithm, text
An algorithm for encoding a word so that similar sounding words encode the same. The first letter is copied unchanged then subsequent letters are encoded as follows:
bfpv -> "1" cgjkqsxzç -> "2" dt -> "3" l -> "4" mnñ -> "5" r -> "6"
Other characters are ignored and repeated characters are encoded as though they were a single character. Encoding stops when the resulting string is four characters long, adding trailing "0"s if it is shorter. For example, "SMITH" or "SMYTHE" would both be encoded as "S530".
(1995-01-05)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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