ISO images are compressed copies of CDs/DVDs that are stored in an archive format with an extension .ISO
ISO images allow you to digitally store information located on CDs/DVDs. You can create an ISO image using software such as WinImage, WinISO, MagicISO. Once you have an ISO image of a CD or DVD, you can store it on a hard drive or burn it another CD/DVD using Nero Burning Rom. I use ISO images to store backups of important CDs/DVDs. Keep in mind, audio CDs and other multi-track disks cannot be converted to an ISO image. If you have important disks at home you might want to consider making a digital archive.