Build the Apollo computer for $3000. Or, you know, $0.

How to build the Apollo guidance computer for $3000.  It cost NASA $150,000.

Actually, that’s misleading.  The $3000 pays for vintage hardware.  The computing power is rounding error in modern terms.  The people who wrote Firefox probably wouldn’t bother to hand-optimize 1Mhz out of the program’s operation.  [Fill in Microsoft joke].  Put another way, this is approximately the same amount of computing power my laptop uses to look at Internet porn on its own, while I’m drinking Sulawesi coffee in another city and it’s powered off.