subdivisions is almost endless. Quilting techniques Many types of quilting exist today. The two most widely used are hand-quilting and machine quilting. Hand quilting is the process of using a needle and thread to sew a running stitch by hand across the entire area to be quilted. This binds the layers together. A quilting frame or hoop is often used to assist in holding the piece being quilted off the quilter's lap. A quilter can make one stitch at a time by first driving the needle through the fabric from the right side, then pushing it back up through the material from the wrong side to complete the stitch; this is called a stab stitch. Another option is called a rocking stitch, where the quilter has one hand, usually with a finger wearing a thimble, on top of the quilt, while the other hand is located beneath the piece to push the needle back up. A third option is called "loading the needle" and involves doing four or more stitches before pulling the needle through the cloth. Hand quilting is still practiced by the Amish and Mennonites within the United States and Canada, and is enjoying a resurgence worldwide. Machine quilting is the process of using a home sewing machine or a longarm machine to sew the layers together. With the home sewing machine, the layers are tacked together before quilting. This involves laying the top, batting, and backing out on a flat surface and either pinning (using large safety pins) or tacking the layers together. Longarm quilting involves placing the layers to be quilted on a special frame. The frame has bars on which the layers are rolled, keeping these together without the need for tacking or pinning. These frames are used with a professional sewing machine mounted on a platform. The platform rides along tracks so that the machine can be moved across the layers on the frame. A longarm machine is moved across the fabric. In contrast, the fabric is moved through a home sewing machine. Tying is another technique of fastening the three layers together. This is done primarily on quilts that are made to be used and are needed quickly. The process of tying the quilt is done with yarns or multiple strands of thread. Square knots are used to finish off the ties so that the quilt may be washed and used without fear