... bar" units. For instance the right-side "6" is "101000" - 2 even-numbered "black bar" units. The left-side is called "odd-parity" because there is an odd number of "black bar" units. For instance, the left-side "6" is "0101111" - 5 odd-numbered "black bar" units. Having different coded numbers for each side allows the barcode to be scanned in either direction. Direct input methods. In the second part of my report on direct input methods I am going to be talking about magnetic stripe readers. A magnetic stripe reader, also called a magstripe reader, is a hardware device that reads the information encoded in the magnetic stripe located on the back of a plastic badge. Magnetic stripe readers can be read by a computer program through a serial port, USB connection, or keyboard wedge, and are generally categorized by the way they read a badge. For instance, insertion readers require that the ...

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