The invention provides a system for preparing an autologous solid-fibrin web suitable for regenerating tissue in a living organism. A data block andor data structure is partitioned into adjacent bit pair domains, such that a single adjacent bit pair from each memory device is assigned to a given adjacent bit pair domain. The conductive metal pattern is formed by forming a metallic nanoparticle pattern on a substrate using a mold made from PDMS polymer as a stamp, and heat-treating the substrate. The arcuate portion, of each row is convex to the user side of the keyboard, and at least two keys in each arcuate portion are elongated.