1.   And over the next five years, Mastercard and Visa are hoping to introduce another line of defense, replacing the magnetic stripes with computer chips.

2.   Airlines, of course, keep track of tens of millions of frequent fliers using cards that identify fliers with simple magnetic stripes.

3.   But the agency has recently started phasing in cards that include holograms, magnetic stripes and digital photographs, which make them more difficult to forge.

4.   But the magnetic stripe, as any New York subway rider can tell you, has to be swiped just so to work.

5.   But while those cards use magnetic stripes to store limited data, smart cards are embedded with microprocessor chips with much more memory.

6.   Do I need a special magnetic stripe reader, or is there a way to download it?

7.   Erlin invented a remote control containing an infrared transmitter, a magnetic stripe reader and a key pad.

8.   It turned out that the ocean floor has markings on it, magnetic stripes, that with a magnetometer show you how old it is.

9.   Magnetic stripes are inexpensive enough to be used in fare cards printed by the millions for use in mass transit systems.

10.   Magnetic stripes are useful because they can be read by credit-card scanners, already present at millions of retail counters.