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Wildcard character
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==Telecommunication== In [[telecommunications]], a wildcard is a character that may be substituted for any of a defined subset of all possible characters. * In [[high-frequency]] (HF) [[radio]] [[automatic link establishment]], the wildcard character {{code|?}} may be substituted for any one of the 36 upper-case [[alphanumeric]] characters. * Whether the wildcard character represents a single character or a [[String (computer science)|string]] of characters must be specified.
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