The FAT file system is older than Windows, but is still widely used for Windows-compatible memory cards on both mobile and small devices due to its relatively easy handling. Another option is to use software that behaves the ISO image as a real disc to install programs and games, or to read the CD as if it was physically inserted into the computer. There are no extra or advanced alternatives like creating or burning an ISO, etc. that can be found in other software. Double-click an ISO image file to automatically mount it as a drive, or right-click the icon on the system tray. Because of this, ISO files are often sent to archives unless their creators have taken great care to compress their content using standard Linux distributions and Windows installation disks. Software purchased online is often compressed to make the downloaded file smaller and the compressed version of the file is often in ISO format, where the file type is after the filename and the period is.ISO. Numbers Software For Mac.