The loading of data then becomes at most a three-stage process, loading the data from the cache or from the database and storing in the cache, as appropriate.

The result, a thermonuclear explosion, is what destroys the target, but the entire three-stage process has to be mimicked if computers are to test weapon-designs reliably.

By 1938, he had developed a three-stage process to duplicate the process from rock to plants and thus more efficiently to the human cell.