Definition(en): Apple Partition Map Disk Image is specific to describing the contents and structure of Apple Partition Map (APM) partition scheme, it can be thought of as a container format for multiple filesystem image files. It was developed by Apple in around 1988 with the introduction of Apple Partition Map scheme on Macintosh II, a scheme that defines how the data is organized on a singular disk. A disk image is a uncompressed copy of the contents of a disk or a folder, it can facilitate certain types of backup and recovery strategies. Please see ID: fdd000348 from Library of Congress and other links attached to this entry for further information.