An ISO file is a disk image that contains a complete copy of the data and structure of an optical disc, such as a CD-ROM, DVD, or Blu-ray Disc. ISO files are often used for backup and archival purposes, as they can be used to create an exact copy of a disc that can be burned to a new disc or mounted as a virtual drive.
There are many different software programs that can be used to open ISO files. Some of the most popular programs include: