The history of the CPU goes back to the 1950s when computers were the size of rooms and had vacuum tube modules. But for our purposes here, we are talking about the first commercial microprocessor. That was the Intel 4004 and it was released in 1971. Things have certainly changed since then, but the 4004 is one of the big stepping stones in our computing history.
Our picture today is not of a 4004. I have a lot of weird old computer bits hanging around the shop. But not that weird. And not that old. This is a super close-up look at the business end of a HP A6436A, a 900MHz processor for the RP7420.
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