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Robert Metcalfe and the Ethernet Technology

Robert Metcalfe and the Ethernet Technology

Harald Sack
On May 22, 1973, Robert Metcalfe, by the time PhD student in electrical engineering working at Xerox PARC, wrote a memo describing a way to transmit data from the early generation of personal computers to a new device, the laser printer. He named the new network technology Ethernet after the disproven luminiferous ether as an “omnipresent, completely-passive medium for the propagation of electromagnetic waves“. Over time, Ethernet has largely replaced competing wired…
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computer science
Who remembers Apple’s Lisa?

Who remembers Apple’s Lisa?

Harald Sack
On January 19, 1983, the Apple Lisa was introduced, the first personal computer to offer a graphical user interface in an inexpensive machine aimed at individual business users. Although a commercial failure, the Lisa paved the way for the famous Apple MacIntosh released in 1984 [4]. I don’t know if you are old enough to remember the early 1980s. But the era of personal computers had just began, which means there were small…
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computer science
Mark Weiser and his vision of Ubiquituous Computing

Mark Weiser and his vision of Ubiquituous Computing

Harald Sack
On July 23, 1952, computer scientist Mark David Weiser was born. Weiser was chief scientist at Xerox PARC in the United States and is widely considered to be the father of ubiquitous computing, a term he coined in 1988. In contrast to desktop computing, ubiquitous computing can occur using any device, in any location, and in any format. A user interacts with the computer, which can exist in many different forms, including laptop computers,…
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