Douglas Engelbert, an engineer widely regarded as a pioneer in computing technology, passed away in California, USA, in July 2013. On Dec 8, 1968, he gave what is now known in the community as "the Mother of All Demos", because of the now-commonplace technologies showcased on that day.
That day he also demonstrated his version of a piece of hardware that he is best associated with. Which piece of hardware?
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This day last year: Q.655