Fitt's Law is a set of multiple rules that creat a good GUI. These are the rules that you always hear the MS and Apple are ingnoring. They state things like, the larger the target and the closer the cursor, the quicker that aqusititon. Thats why you can supposedly move about the filesystem quicker if you custom icons that are huge.
This is why the Apple menu bar is great. If you think about it, the buttons are of infinite size, since you can throw the cusor as hard as you want to the top, but you always get to the menu bar.
They did a test on Apple users, and they figured out that if there was another screen over the menu bar, apple users would throw their cusor so hard at the menu bar it would almosty reasch the top of the next screen!
This menu bar's efficiency is the main reason the whole mac OS is more efficient that MS's overall. The MS menubar is a disaster of ergonomics, since it cannot be attached to the top by copyright law, it needs to be on the menu bar, making it an infinitely smaller target. Get it?
Same with the windows tast bar, you have to aquire the small button, you cannot go to the direct bottom, you must first move towards the taskbar, and then slow down to aquire the button you want, if you go all the way to the bootm of the screen, it wont do anything if you click.
There are portions of the screen that are more accessable to some users than others. For right hand users, they go like this:
1. Upper Right Corner
2. Lower Right Corner
3. Upper Left Corner
4. Upper Left Corner
Replace the right with left for left-handers
This strikes a blow to MS Win. Is bill left handed? cuz he built an OS that thinks everyone else is.
That start button is in the hardest place to get on the screen for a right-hander, the bottom left corner, and how many times a day does the average user do that? And again, this button is hard to aquire since it doesn't lie on the exact edge of the screen. Quite often i would suppose.
The icons are on the left side, further hurting it's accessability to right-handers.
Wondows is ergonomicaly correct in some respects, right click can be very functional. What could be easier that getting to where you already are?
whew! i think theres bunches more, but this is what i know off the top of my head