Biometrics uses unique physical characteristics to identify individuals. Historically, biometrics dates back to ancient times when fingerprints were used to sign clay tablets. Modern biometrics emerged in the late 20th century with automated identification systems. Today, biometrics has advanced and is used for applications like airport security screening and unlocking devices. In the workplace, companies are implementing biometric time clocks to identify employees and track work hours. This reduces payroll costs and administrative errors while eliminating "buddy punching," where one employee clocks in or out for others.