Layers of translation(abstracts) between countless platforms.

controllers are pass off hardware mechanisms(processors)....making the translation from one platform to another.

``interoperability guidelines``.... depends on the platforms that are to integrate.

Different flash card media support different issues of

interoperability... from the physical size to controller schemes allowing different OS systems to mate....each card consortium sets it`s ``interoperability guidelines``.

100`s of um if not 1000`s

doni