The present application provides an improved segmentation method and system for processing digital images that include an imaged document and surrounding image. The method includes receiving a first message from a first base station by a mobile station. Magnetic reading unit 21, 22 output magnetically read data acquired by reading the printed magnetic ink characters from the slip as the slip passes through the transportation path, and optical reading unit 23, 24 output image data captured by optically imaging the same slip during the same pass through the transportation path. Multiple data items within a second of the multiple informational categories associated with the selected first data item are retrieved. A method of making an optical disc includes indenting a pattern onto an insulator; and depositing a thermally conductive material into indents of said pattern. The primary replica contains first checkpoint information.