How things Work

If you've ever used the Internet, it's a good bet that you've used the Domain Name System , or DNS , even without realizing ...

How Night Vision Works Gyro-stabilized day/night binoculars manufactured by B.E. Meyers Company. ­ The first thing you probably think of w...

How RFID Works An RFID tag. Long checkout lines at the grocery store are one of the biggest complaints about...

A GPS receiver uses satellites to pinpoint locations. How GPS Receivers Work Our ancestors had to go to pretty...

How Location Tracking Works These days, even traffic lights are keeping an eye on you. As children playing hide and seek, there se...

How Facial Recognition Systems Work Anyone who has seen the TV show "Las Vegas" has seen facia...

How Fingerprint Scanners Work A computer mouse with a built-in fingerprint scanner Computerized fingerprint scanners have been a ma...

How CAPTCHA Works   You're using your computer to purchase tickets to see They Might Be Giants play a concert at a local venue. Before y...

How Code Breakers Work Information is an important commodity. Nations, corporations and individuals protect secret information with encrypti...