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#OTD 50 years ago, Intel released the first commercially available microprocessor, the 4004. For the first time, a computer's entire CPU could be in a single IC package. It had all the computing power of a handheld calculator, but that too was revolutionary at the time. https://en.wikipedia.org/wiki/Intel_4004
@arielmt It's quite the oddball, in a way - the 4004 itself had very little impact per se, but ignited a revolution in CPU design, leading not long after to the likes of the 8008/8080/Z-80 and the upstart 6502, the latter of which underlay almost all of the first home computers, from the PET-2001, TRS-80 and Apple II, through to the BBC Micro, Commodore 64, and the Spectrum.