A fingerprint scanner is a small electronic device that guards your computer from intruders. You place your fingertip on the reader; it scans your fingerprint and compares it to the prints stored in ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. You probably already know how to scan a QR code with your phone. It ...

You don't need your phone to open a QR code. You probably already know how to scan a QR code with your phone. It's simple enough: just open the camera app, point your phone at the code, and tap the ...