This niftiness was sent in by Jimmy Wales. On this one graphic is all the stuff you need to know to jump start a civilization (or get super rich if you travel back in time). To be sure it comes with you on your travels they sell it as a t-shirt, so unless you happen to be using that time machine from Terminator that only works on naked people, you are all set. James Welcher also noted that it is particularly interesting to cross reference this document with “Phone call to the 14th century” by Kasper Houser [mp3 audio].
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