Adrian wrote in news:ljjtbl$6au$2
@speranza.aioe.org:

On Sun, 27 Apr 2014 20:31:27 +0100, Bill Wright wrote:

Katie, who is 11, was helping me in the workshop today. She told me how
some of her class been in trouble for filming the teachers covertly. Of
course I told her how, in 1965, I'd made a sound recording of our maths
teacher, with the class deliberately winding him up just to make it more
fun. I then found myself trying to explain about reel-to-reel tape
recorders. I could see that Katie just couldn't grasp the concept.
Finally she asked, "But how much memory did it have?"

I don't know whether to laugh or cry...

It's slightly scary that there's people wandering around who regard the
CD as pre-historic. I feel old.

With the old devices we all had some inkling of how they worked and if we
were to survive some sort of massive global disaster we would have known
enough about the principles to get these devices back in use. Nowadays the
ability to make or even understand common devices is in the hands of very
few people. Who remembers using a pin and some rolled up card to listen to
a 78rpm record?