Laptops What does this sensor on my laptop do?

[cool_dude]

I recently got a laptop from my office. It's Dell Latitude E6420. I can see a sensor on my laptop, but don't know what it is. Can you please tell me what does it do?

Please see the attached pics.

 

[Criminal]

fingerprint reader

 

[cool_dude]

Ohh... Thanks!

 

[nimod]

fingerprint reader

Your Laptop might be linked with your Adhaar number soon

 

[walibaa]

you can use this reader instead of password to log into your windows