In a few weeks or maybe a few days, depending on the weather, they will be popping out of closets everywhere. Like the school bells ringing or getting stuck behind a school bus in the morning, they are one of the sure signs of fall. They are all different. Some are purple, black, orange, green or blue, but they all mean the same thing - I'm a letterman and I've got a jacket to prove it. These athletic jackets are worn with a sense of pride around town for athletic accomplishments. In the hallways, they are a sign of "Yes, I'm one of them." At least for a couple of years, they are a main part …