2.  Biometrics refers to the identification of humans by their characteristics or traits. Biometrics is used in computer science as a form of identification and access control.

3.  Biometric identifiers are the distinctive, measurable characteristics used to label and describe individuals. These are used by machines and software to work out a process.

4.  Examples include, but are not limited to fingerprint, face recognition, DNA, Palm print, hand geometry, iris recognition, retina and odour/scent. Within a hospital or at a doctors surgery, biometrics can be used so that only certain people can access certain equipment or medication.

5. Increase security - Provide a convenient and low-cost additional tier of security. Reduce fraud by employing hard-to-forge technologies and materials, e.g. finger prints. Reduce password administration costs. Replace hard-to-remember passwords which may be shared or observed.

6. The finger print scanner and the hand or palm geometry can pass on illness to the workers Biometrics security is expensive to install Takes a long time getting peoples data onto the system