Refactoring Refactoring (Robert X. Cringely) -- "The cameras can, for example, be told to look for a particular face, a particular behavior, a sound (gunfire?), or even to look for a unique biometric measure like the iris of a criminal's eye. Iris patterns stabilize around the first year of age and don't change again. Morton's system can identify iris patterns through dark glasses or contact lenses and can do so almost instantly for thousands of people passing through airport metal detectors or subway turnstiles. Creepy, eh?"