This document discusses biometrics and how they can be used for identification and verification purposes. It defines biometrics as the collection and analysis of biological data, such as fingerprints, iris scans, and other physical or behavioral traits that are unique to each individual. It explains that biometric systems can be used to verify someone's identity, identify unknown individuals, and screen people, such as at borders or airports. Fingerprint scanning and iris scanning are discussed as two common biometric techniques.