Biometric devices are a relatively modern technology---in use during the latter half of the 20th century; however, massive development and common use of biometric identification systems really began in the early 21st century. Currently, biometrics has many functions.

Fingerprint Recognition

One of the cheaper and more common forms of biometric devices is fingerprint recognition devices. They read a portion of a person's finger for proper identification.

Eyes

The other major form of recognition by biometric software is iris and retina reading. This software is generally very expensive and is relatively uncommon, except in organizations and companies of high security.

Accuracy

The goal of biometrics is to provide fast, accurate readings---preventing unauthorized access. Biometrics allows for a greater security level than would have otherwise been possible.

Fast

Since biometrics performs scans, there is no need for security codes or keys---this can create a faster and simpler system to gain access to areas or information.

Management

Biometrics currently serves a key role in management. Since systems are electronic, they store data; therefore, it is very common for employers to use biometric systems as time clocks, an automated way of tracking employees accurately.