The numbers that control your life. You're identified by dozens of numbers. Your phone number, your driver's license number, your social security number, your zip code, your license plate, your credit card numbers. I find these numbers fascinating. Who distributes them? What can they be used for? How can you use them? How are they issued?
a circle of cells with windows facing inwards, towards a tower, wherein jailers could look out and inspect the prisoners at any time, unseen by their subjects.