Not all machines are for embroidery only. Some are a combination of embroidery and sewing. Some of the more advanced features becoming available include a large color touchscreen, a USB interface, design editing software on the machine, embroidery adviser software, and design file storage systems. Commercial embroidery machines can be purchased as 1, 2, 4, 6, 12, 15, and 18 head machines. Industrial embroidery machines are available from 12 to 56 head models.