Biometrics is the science of establishing security for person identification. It refers to the automatic recognition of a person based on his/her physiological or behavioral characteristics. It is possible to confirm or establish an individual’s identity based on the traditional methods involving passwords and PIN numbers for its accuracy and case sensitiveness by using biometrics. Examples of such applications include secure access to laptops, buildings, cellular phones, computer systems and ATMs. In the absence of strong personal recognition schemes, these systems are vulnerable to an impostor. In this paper, a brief overview for biometrics is presented. Various biometrics modalities are compared based on different perspectives and their feature sets described. In conclusion it is observed that no single biometric can effectively meet the requirements of all applications. Therefore there is a need to combine two or more biometric features for foolproof personal identification.