● Biometrics refers to the measurement and statistical analysis of people's unique physical and behavioral characteristics. It is primarily used for identification and access control.  
  ● Types of Biometrics: Includes fingerprint recognition, facial recognition, iris recognition, voice recognition, and DNA matching. Each type uses distinct biological traits for identification.  
  ● Fingerprint Recognition: One of the oldest and most widely used biometric technologies. It analyzes the unique patterns of ridges and valleys on a person's fingertip.  
  ● Facial Recognition: Utilizes algorithms to identify individuals by analyzing facial features. It has gained prominence in security and surveillance systems.  
  ● Iris Recognition: Involves scanning the unique patterns in the colored ring of the eye. Known for its high accuracy.  
  ● Voice Recognition: Analyzes vocal characteristics to verify identity. Used in phone banking and customer service.  
  ● DNA Matching: The most accurate form of biometric identification, used in forensic investigations.  
  ● Aadhaar: India's unique identification system, uses biometrics like fingerprints and iris scans to authenticate residents.