by Guest » Fri Apr 08, 2005 9:28 pm
Because the inch-pound system is evil, and nothing about it makes any sense. Glad I got that out of the way.
Best I can do is the pound is derived from an ancient Roman weight, the libra, and the abbreviation is derived from that. It supposedly was a little lighter than the modern pound, about 327 g. I don't know why ounces are abbreviated oz.