[delacoert]

The following image is a screen capture of my attempt to see the effects of kerning in MS Word. Apprently, either I'm doing something wrong, or Word does not kern by default. The lines have the same number of A's and T's. When the A's and T's are next to each other, the kerning should put the characters closer together so the lines should not be the same length.

[muawiyah]

On the Format menu, click Font, and then click the Character Spacing tab. There's a little box 2/3 down, 1/3 to the right. "kerning" is right there next to the box.

[El Gato]

As the next post after yours indicates you didn't have kerning turned on. I ran the experiment with and without kerning and the difference is amazing. However even without you can see that the A and T do not take the same amount of width. Notice that the center of the T in your first line does not line up with the center of the A in your second line. The total line length is the same because you had the same number of each in both cases.