[Margaret Pilkington]

Thank you for taking the time to explain so clearly.
It has helped me a lot.....and I would guess there are a few others who have learned something from this answer.
I have been looking at e-readers.......not necessarily the Kindle, but others that have more applications...and was baffled by the jargon.
I looked it up on google too but was just as confused when I finished...........it seems that many people assume we all know what these terms mean.
It is a lot clearer to me now