Polymer memory refers to memory technologies based on the use of organic polymers. Some of these technologies use changes in the resistance of conducting polymers under read/write control. Other architectures are based on ferroelectric polymers. The properties of polymer memory are low-cost and high-performance, and have the potential for 3D stacking and mechanical flexibility. Variants can be write-once or multiple-write. Printed versions of this technology already exist and are used in low-density applications such as toys.