My own Apollo landing computer!
A few days ago tithonium was wondering about the computer hardware used to land people on the moon during the Apollo missions. Well this isn't a complete answer but someone has recreated the Apollo Guidance Computer (AGC) which was used in the Apollo's Command Module (CM) and Landing Module (LM). Even better he has provided plans and documentation so you can build your own. So here's exact information about some of the computers used to get to the moon.
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Compare to 8x3ghz, 8gb of ram. Let's be simplistic and say that it's 24,000 times faster and has 524,288 times as much ram. So, theoretically, the machine that I use to transcode the daily show and play halflife could simultaneously crash several thousand lunar landers into boulder-strewn craters.