A brief introduction to ISO 9660 standard, its history and its directory and files standard.
The ISO 9660 Overview
What is ISO 9660 standard?
In this article,MiniToolwill tell you what it refers to.

ISO 9660 is the standardfile systemfor CD-ROMs and also widely applied to DVD and BD media.
It can be stored on USBmemory sticksand hard disks.
It supports various computer operating systems such as Windows, classic Mac OS and Unix system.
It seems that some operating systems can create incompatible CDs, so be careful about it.
At present, the ISO 9660 file system currently has two standards, Level1 and Level 2.
Level1 is compatible withDOSand its file name is in the traditional 8.3 format.
Besides, all characters can only be 26 uppercase English letters, 10 Arabic numerals and underscores.
History of ISO 9660 Standard
ISO 9660 evolves from High Sierra file system.
Both directories and files are stored as ranges, which are a contiguous series of sectors.
Files and directories are distinguished only by file attributes that indicate their nature (similar to Unix).
The file attributes are stored in the directory entry of the description file or in the extended attribute record.