For the general public, yes, h, da, d, and c (with the exception of cm) are unnecessary for a national conversion program. But for specialized uses such as the water management situation that I had given where they chose to use dam3 and in agriculture where the ha (hm2) is a rational sized unit these "multiples of 10" increments do have a use. Nationally keep the "multiples of 1000" (µ, m, k, M, G) and educate the public, but each industry should be able to take advantage of the other prefixes that could generate rationally sized units of measurement. greg >>> Pat Naughtin <[EMAIL PROTECTED]> 2001-02-20 22:49:49 >>> Dear Jim, Greg, and All, on 2001-02-20 02.20, James R. Frysinger at [EMAIL PROTECTED] wrote: > That works for me, Greg, but some people here don't like the prefixes > hecto, deca, deci, and centi except for a few special cases. I think > they're fine, though. > > Jim I think they're fine too. Fine for historical purposes, and fine for games that are played by numerate people. But, in my experience, hecto, deca (deka?), deci, and centi add a painful slowness to any conversion program from any old measuring units to SI. Cheers, Pat Naughtin CAMS Geelong, Australia
