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The first commercially available microprocessor. Its introduction sparked a revolution with its long line of successors still acting as the base for most modern computer operations.
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This, the first portable scientific calculator was introduced by HP in 1972. Like its successors, it was capable of solving more complex equations than the older mechanical calculators.
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Though not the first attempt at a networking system, Ethernet, developed by the Palo Alto Research Center, eventually became the commonplace physical networking system after its commercial introduction in 1980.
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The Xerox Alto becomes the first computer to integrate, from its inception, a graphical user interface (GUI). Today, nearly all commercially available operating systems rely on a GUI.
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Developed by Micro Instrumentation and Telemetry Systems (MITS), the Altair 880 became the first relatively "popular" home computer. It featured extremely limited processing capabilities.