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.

This led to the development of the Needleman Wunsch algorithm, which is a dynamic programming algorithm for comparing sets of amino acid sequences with each other by using scoring matrices derived from the earlier research by Dayhoff.

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.