In the late 1990s, Pulse Microsystems introduced networking to embroidery machines. It added a box, which allowed them to network and then pull designs from a central server. It also provided machine feedback, and allowed machines to be optically isolated to protect machines in an industrial environment. Since then, computerized machine embroidery has grown in popularity as costs have fallen for computers, software, and embroidery machines. Many machine manufacturers sell their own lines of embroidery patterns. In addition, many individuals and independent companies also sell embroidery designs, and there are free designs available on the internet.