8. A content-addressed search system for use with a text processor having a read/write storage for at least one coded text string, printing means for responding to coded signals to perform operations including the positioning of a print point along a line and the printing of indicia on a medium, and keyboard apparatus that includes keys that are operator actuatable to produce codes representing printing operations, there being at least one set including plural keyboard codes that correspond to confusingly similar printing operation, said search system comprising: means for defining an address code string based on a sequence of key actuations and for storing said address code string; first converting means including means for sequentially accessing said text string codes from said read/write storage, means for detecting members of said set and means for converting detected set members to a predetermined common code for the set; second converting means including means for sequentially accessing address string codes, means for detecting members of said set, and means for converting detected set members to said common code for the set; and means for comparing the text string codes as modified by said first converting means with the address string codes as modified by said second converting means to locate a position in the text string where a match occurs.
10. A search system according to claim 8 wherein means is provided for operator selection of the direction in said text string for the sequential accessing by said first and second converting means.