Magnetic drum

The Mark III and Mark IV used magnetic drum memory and the Mark IV also had magnetic core memory.

So, I have to use a 1980s drum scanner, which was designed in the days when everyone shot photographs on film.

Folk musician and storyteller David Holt plays the banjo and shares photographs and old wisdom from the Appalachian Mountains. He also demonstrates some unusual instruments like the mouth bow and a surprising electric drum kit he calls thunderwear.