Most of us take the computer interface for granted. The more I think about it, the more far-reaching the implications seem. It has been a given in computer science and the metaphors drawn from it that memory is finite. Memory, then, would always be an open frontier waiting to be settled rather than a densely populated region within which painful trade-offs have to be made in order to accommodate change.
Programmers think of a bit as the smallest addressable unit of memory.
Nothing else, nothing in-between. Intel now says, on the contrary, that a bit may store gradations of charge. And that's just to start. If a bit can hold four values, it can hold eight, and if eight then perhaps sixteen, and so on to some as yet undisclosed limit. Earth is no longer at the center of the solar system.