may 12, 1932 - Magnetic drum secondary storage memory

Description:

In the ARC
drum spins around
holds a few KB of data
popular until the 1950's
https://www.youtube.com/watch?v=-KRLWGaIunA
patented by Tauscheck
http://www.computerhistory.org/storageengine/tauschek-patents-magnetic-drum-storage/
replaced by magnetic cores for primary storage and disk drives for secondary storage

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