I've run across at least two articles this week trying to revive interest in changing the rest of the world (which seems to currently be the United States and a few other backwater countries) to the metric system (or the SI system or whatever tiny variant of it you care about). Even the Brits are doing it, and they're the reason we call Imperial units Imperial units. This really makes very little difference in my life, but apparently people who work with tools and things run into problems a lot. There are lots of decent (and just kinda weak) arguments for changing. I wouldn't protest if they decided to change it, but it isn't something I'd ever advocate. My brain is wired to think in inches and pounds and miles and all my frames of reference are in that system. Someone pointed out in the comments on one of the articles that Imperial units feel more 'human' to people: for example, if I asked you to indicate how much was "a little bit" of something by showing me the distance between your thumb and forefinger, you're much more likely to make an inch than a centimeter. A foot is, well, about the size of a foot. Also, we have nice monosyllabic names for things: inch, foot, pound, pint, mile, yard. Cheese-eating surrender monkeys require 2-4 syllables for nearly everything. FOCUS: Metric system, yea or nay?