A jazz sus chord or dominant 9sus4 chord is a seventh chord on the fifth scale degree of the key with a suspended fourth and an added ninth. Functionally, it can be written as V9sus4 or V7sus9.
ISO (International Organization for Standardization) is an independent, non-governmental membership organization and the world's largest developer of voluntary International Standards.
ISO is an all-purpose acronym created by the International Organization for Standardization. The letters are used so they mean the same thing in every language. A file with an ISO extension is an image that is an exact copy of a CD. It contains all the files and folders contained on the original disc.