The document describes several types of sewing machines, including domestic sewing machines that can be run by foot or electric power, industrial lockstitch sewing machines with automatic lubrication used for mass production, overedging sewing machines that finish raw edges, embroidery sewing machines for decorative stitches, buttonholer machines that make buttonholes, button attachment machines that attach buttons, double needle machines that reinforce seams for clothing construction, and bartacking machines that reinforce pocket openings and closings.