Last night I was working at the bookstore, and a young man came in to look at some sci-fi books near my register. At first glance as he walked by, it looked like the cuff on one of his pant legs was turned inside out. I considered letting him know, so that he could fix it and be spared looking disheveled.

Then I took a second glance.

On his left ankle was what looked like a Velcro wristband wallet, like the lame wallets that were popular in the 80's. There was only one exception, it blinked.

I realized that this young man was wearing what The National Commission Against Drunk Driving calls an EMD or Electronic Monitoring Device. I thought to myself, you hear about these things all the time, but when was the last time you saw someone wearing one? I had never seen one before, and it was kind of interesting.

Here is another link about electronic monitoring devices.