Today in Tech History – November 21, 2017

Today in Tech History logo1877 – Thomas Edison announced his invention of the phonograph, a machine that could record and play sound.

http://www.history.com/this-day-in-history/edisons-first-great-invention
http://memory.loc.gov/ammem/edhtml/edcyldr.html

1905 – The Annalen Der Physik published Albert Einstein’s paper, entitled “Does the Inertia of a Body Depend Upon Its Energy Content?” The paper revealed the relationship between energy and mass. You know the relationship as E = mc².

http://www.edn.com/electronics-blogs/edn-moments/4401906/Einstein-paper-outlines-E-mc2–November-21–1905
http://www.physik.uni-augsburg.de/annalen/history/einstein-papers/1905_18_639-641.pdf

1969 The first permanent ARPANET link was established between the Interface Message Processor or IMP at UCLA and the IMP at the Stanford Research Institute.

http://www.computerhistory.org/tdih/November/21/

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