This document discusses biometrics technology, including its history, common types of biometrics like fingerprints, facial recognition, iris scans, and voice recognition. It explains how biometrics are unique physical traits that can be used for identification. Some key benefits of biometrics are that they are unique to each individual, provide time-stamped security, and reduce identity fraud. Examples of biometric applications include access control, time and attendance tracking, and border security in airports. However, biometric systems also have disadvantages like cost, potential for errors, and privacy concerns.