The major limitation in using semiconductor memories is the cost per bit of the stored information.

Solid-state storage has seen similar dramatic reductions in cost per bit.

That is, it has more information per bit, or a higher entropy.

In the past, he said, the cost per bit stored dropped by a factor of four with each new chip generation.

In general, the technology that scales to the smallest cell size will end up being the least expensive per bit.

Tape remains a viable alternative to disk in some situations due to its lower cost per bit.

Note that 8-cycle per bit has nothing to do with bytes.

And even then, what work they did required a scanning tunneling microscope per bit.

The number of magnetic transitions per bit is on average 1.5 (50%*1 + 50%*2).

This dominance has led to high production-volume components, which in turn have allowed extremely low cost per bit.