<page_title> List of United States Navy ratings </page_title> <section_title> Engineering and hull ratings </section_title> <table> <cell> Machinist's mate <col_header> General rating </col_header> </cell> <cell> MM <col_header> Abbreviation </col_header> </cell> </table>
Machinist's mate (or MM) is a rating in the United States Navy community.