Optical disc
File systems

File systems specifically created for optical discs are ISO9660 and the Universal Disk Format (UDF).

ISO9660 can be extended using the "Joliet" extension to store longer file names than standalone ISO9660. The "Rock Ridge" extension can store even longer file names and Unix/Linux-style file permissions, but is not recognized by Windows and by DVD players and similar devices that can read data discs.

For cross-platform compatibility, multiple file systems can co-exist on one disc and reference the same files.
detectable_content:postscript