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.

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.–November-21–1905

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.

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