I hate, HATE, the idiocy we have in this world still because of the short sightedness of a bunch of uneducated money grubbing "leaders". The imperial system should be banned from the face of this earth and anyone who advocates its continuation should be made to work as forced labor to make the conversion for everyone on the earth on demand 24hrs a day 365 days a year without vacation. And if they make a mistake they get no food for a week. Morons morons morons.......Oh sorry, I have no opinion on this.....Hundreds of billions of US dollars have been lost because people were afraid to lose an initial billion or so dollars during the change over. Nothing like living in a world where you never know if your airplane has enough fuel ( http://en.wikipedia.org/wiki/Gimli_Glider ), or if that 400 million dollar spacecraft is going to smash into the planet instead of orbiting it ( http://en.wikipedia.org/wiki/Mars_Climate_Orbiter ), or if the piece of equipment you are working on has imperial fasteners, or metric, or whitworth, or all three at the same time. Does your factory repair shop stock metric and inch bolts of every type just to cover the possibility that the next thing you need to repair has one or the other? Which drills and taps do you have on hand? Which wrenches and Allen keys? Is it a metric straight pipe thread or an imperial tapered? What size is that shaft and bearing? AHHHHHHHHHHHIMHO, anyone who uses stupid ambiguous "lingo" for science and engineering should be fired and sent to the metric conversion calculation farm for one year each utterance of such nonsense. Say "millimeters" or "inches" or stand before my firing squad. Idiots.....