Metric System

I'd use Liters, Kilograms, and Meters when doing Engineering stuff, though, because the Metric system works wonderfully for things that aren't so everyday. If only it weren't base 10.

The annoying thing with that is, a lot of the time, you're going to want to divide by 2 a lot. Say something is 27 cm long and you cut it into 2 halves. They're each 13.5 cm. And say you want to put a hole through the center of each half. Then the hole is 6.75 cm from each end. And say you want to shear off half from each side so that the whole thing gets downsized. Then you have to measure out 3.375 cm, and so on.

Each digit in base 10 can only take one power of 2, so it's weak in that respect. Then again, so would base 6. Base 12 would be preferable there, since each digit can be divided by 2 twice:

1
0.6
0.3
0.16
0.09
0.046
0.023
0.0116

etc