An ISO image is an archive file (also known as a disc image) of an optical disc in a format defined by the International Organization for Standardization (ISO). This format is supported by many software vendors. ISO image files typically have a file extension of .iso. The name ISO is taken from the ISO 9660 file system used with CD-ROM media, but an ISO image can also contain a UDF file system since UDF is backward - compatible with ISO 9660.
In the context of files and programs, an "image", whether an ISO, floppy, or other media image, is simply a file that can be used as a virtually identical copy of the original media. This file not only contains individual data files; it also contains track and sector information and arranges all this information in a file system, just like disk media. Image files, unlike normal files, are usually not opened; rather, they are mounted.
An ISO image is simply a CD-ROM or DVD image saved in ISO-9660 format.
ISO images are mainly used as source files from which to create media. As an example, most distributions of Windows,Linux release ISO images of the installation media.
WinISO is a comprehansive ISO editing software that can access or manipulate ISO image files.