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links for 2009-09-12

  • The Theory of Interstellar Trade is a paper written in 1978 by economist Paul Krugman. He described the paper as something he wrote to cheer himself up when he was an oppressed assistant professor, caught up in the academic rat race.
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links for 2009-09-08

  • The slide rule, also known colloquially as a slipstick,[1] is a mechanical analog computer. The slide rule is used primarily for multiplication and division, and also for "scientific" functions such as roots, logarithms and trigonometry, but is not normally used for addition or subtraction.
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