What is the fullform of iso?

Answer 1

It is internationally known as the International Organization for Standardization. The name "ISO" is not actually an acronym or abbreviation of the organization's full name rather it was derived from the Greek word isos (ἴσος), which means "equal." The founders of the ISO knew that the initials of the organization will be affected when translated to different languages, they decided to go for the universal short form "ISO."

Answer 2

If you are referring to ISO as in an image file, there is no full form of that abbreviation.