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On November 15, 1971 Intel introduced the
4004 Microprocessor. It has been claimed as the world’s first
microprocessor. Originally it was designed to power the Busicom
calculator. 4004 was unbelievably fast for its time with a clock
speed of 400 kHz. Today Intel’s microprocessor clock speeds are in
the multi-GHz range.
4004 took the integrated electronics (Intel) one step further by
integrating CPU, memory and I/O controls into a single chip. This
provided the technological foundation of Intel as we know the
company today.
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