ocr: Uperator Meaning xample ? Wildcard character. Search for terms that can be formed Search for: bys substituting any character for the question mark (?). H?tter - Search for: Wilcard string. Search for terms that can be formed by substituting zero or more characters for the asterisk (*). *torian Word expansion. Search for words that occur trequentiy Search for: with the specitied word. History! () rocess $ search words enclosed by parentheses before Search for: evaluating those outside the parentheses. (Swiss francs.