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 controls the sensitivity to light of a particular film or camera. ISO is a measure of film speed or sensor sensitivity. ISO stands for International Organization for Standardization and replaced what used to be called ASA, which was American Standards Association. Both mean the same thing as far as photography is concerned.