

He has been running video game servers from home for more than 10 years using Windows, Ubuntu, or Raspberry Pi OS. Nick's love of tinkering with computers extends beyond work. In college, Nick made extensive use of Fortran while pursuing a physics degree. Before How-To Geek, he used Python and C++ as a freelance programmer. He has been using computers for 20 years - tinkering with everything from the UI to the Windows registry to device firmware. Nick Lewis is a staff writer for How-To Geek. Most operating systems (and many utilities) also allow you to mount an ISO image as a virtual disc, in which case all your apps treat it as if a real optical disc were inserted. The idea behind ISO images is that you can archive an exact digital copy of a disc, and then later use that image to burn a new disc that's in turn an exact copy of the original. They are a sector-by-sector copy of the disc, and no compression is used. You can think of an ISO image as a complete copy of everything stored on a physical optical disc like CD, DVD, or Blu-ray disc - including the file system itself. The name ISO was taken from the name of the file system used by optical media, which is usually ISO 9660.

They are often used for backing up optical discs, or for distributing large file sets that are intended to burned to an optical disc. An ISO file (often called an ISO image), is an archive file that contains an identical copy (or image) of data found on an optical disc, like a CD or DVD.
