The term 'KIND OF ERROR' can be broken down into three crossword solutions: CLERICAL (8 letters), UNFORCED (8 letters), and TYPOGRAPHICAL (13 letters). A CLERICAL error is an unintentional mistake made in the process of recording or transferring data, such as a typo or incorrect entry. An UNFORCED error is an error made by a player in a sport that is not caused by the opposing team. Typographical errors are mistakes made in the printing or typesetting of a document, such as a misspelling or incorrect punctuation.