Which of the following is NOT a biometric device?

A smart card reader is not classified as a biometric device because it relies on the physical card itself for verification, rather than measuring a unique physical characteristic of a user. Biometric devices operate on the premise of identifying individuals based on intrinsic traits such as fingerprints, facial features, or retinal patterns.

In contrast, fingerprint scanners, face recognition scanners, and retina scanners all function by capturing and analyzing specific biological data unique to each individual. This is what defines them as biometric devices. Each of these technologies utilizes different methods to authenticate a user by comparing their biological data against stored templates, ensuring a higher level of security and personal identification.